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Welcome
This is the website of the Optical Device Research Group at the National University of Singapore managed by Aaron Danner, an Associate Professor in the Electrical Engineering Department. This site was last updated July 27, 2014.


NEWS UPDATE This is the Chinese Garden in Singapore. The image on the right is an example of a gradient index lens (this is a simulation created with software the group wrote). One of our images was shown on Discovery Channel and MSNBC News. Two Laser Focus World articles are also available here and here.


Aaron Danner 2014
Prof. Aaron Danner
Dept. of Electrical and Computer Engineering
National University of Singapore
4 Engineering Drive 3
Singapore 117576
Tel: (+65) 6516-2111
Fax: (+65) 6779-1103
E-mail:

Overview of Research Projects
Our group is interested in the future of photonics, especially materials and structures that can enhance light-matter interaction. We are interested in controlling light on the nanometer scale, which can permit applications in holography, arbitrary optical wavefront generation and detection, and optical communications. We are also interested in fabrication of optical materials and devices, and our group is actively engaged in industrially-relevant research in vertical cavity lasers, laser development for light/heat delivery in magnetic data storage applications, solar cells, and nonlinear optical materials useful for long distance optical fiber communications. We are also interested in unusual optical materials which could, in the future, permit a photonics-lab-on-chip and create highly integrated optical components. This will be necessary not only for future optical datacom applications, but also for quantum optics applications where programmatic control of single photons will ultimately be required. Our group also hosts the undergraduate student NUS Solar Powered Helicopter Team.

Raytracing in anisotropic, gradient index objects
As shown in the two images above, we are interested in how light behaves in unusual, and sometimes impossible, objects. Since many objects that could conceivably be constructed with metamaterials are quite unfeasible, it is worthwhile to see how such objects would actually behave if built. Our software can handle arbitrary complexity in both gradient and tensor of the permittivity and permeability and can do so with photorealism. We are now studying the ulitmate limitations of optics (what kinds of lenses are possible, and what kinds of lenses are impossible from a theoretical standpoint), as well as various aspects of birefringence and optical singularities (where the refractive index may go to infinity or zero) to find fundamental limitations. This research lies at the intersection of theoretical physics and physical optics. Ever wonder what a swimming pool full of negative index water would look like?

A handful of gradient index optical devices. The leftmost two devices correspond to the devices depicted in the images above.

Photonic crystals and surface gratings in solar cells and LEDs
We aim to enhance the collection efficiency of solar cells through surface texturing while at the same time reducing build-up of dust. This research involves the study of surface energy, optical simulation, and field tests.


Modulators and sensors in lithium niobate and nonlinear optical materials
Our group has developed a process where lithium niobate can be etched with an undercut in a monolithic process to create vertical index confinement, a difficult feat in a material that is so difficult even to dry etch. We are currently in the process of applying this method to create nonlinear optical devices on a chip. This process was pioneered by Mr. Si Guangyuan, Ph.D. candidate. Our group is also in the process of developing small optical resonators on silicon that are electrically tunable.
Surface plasmons and plasmonic VCSELs
Our group is investigating the possibility of integrating III-V quantum dots into a metal matrix in which a surface plasmon mode can propagate. The purpose, of course, is to try to compensate the loss from the metal with gain from the quantum dots. We are currently pursuing this in both simulations and experiments. We are also interested in the use of surface plasmon-like resonant devices for use in heat-assisted magnetic recording (HAMR), such as development of a laser with a subwavelength output aperture which could aid recording in bit patterned media.

Recommended Reading and Links for Students
Photonic crystals, and other periodic structures can be modeled in frequency space using the planewave expansion method. Prof. Danner's tutorial on the plane wave expansion method may prove useful to students interested in learning how photonic crystal band diagrams can be calculated from first principles. While commercial and free tools are available to calculate bands of photonic crystals, a similar method can be used to model electronic bands in semiconductors. A step-by-step description of the pseudopotential method may be useful for students trying to learn the method. The link also includes a downloadable Mathematica file that implements the method. For students interesting in getting started, the following reading material in sequence is recommended (with a basic knowledge of electromagnetic fields assumed).

Recommended technical books and articles (in order from novice to advanced):
  1. Photonic Crystals: Molding the Flow of Light (ISBN: 0691037442), by John D. Joannopoulos, Robert D. Meade, and Joshua N. Winn., Princeton University Press, 2005.
  2. Silicon Photonics: the state of the art (ISBN: 0470025794), by Graham T. Reed, Wiley-Interscience, 2008.
  3. J. B. Pendry, D. Schurig, and D. R. Smith, “Controlling Electromagnetic Fields,” Science, vol. 312, no. 5781, pp. 1780 – 1782, 2006.
  4. M. Notomi, “Theory of light propagation in strongly modulated photonic crystals: Refractionlike behavior in the vicinity of the photonic band gap,” Phys. Rev. B, vol. 62, no. 16, pp. 10696 – 10705, 2000.
  5. Geometry and Light: The Science of Invisibility (ISBN: 978-0486476933), by Ulf Leonhardt and Thomas Philbin, Dover, 2010.
Recommended “easy-reading” books to broaden the mind:
  1. Minds, Machines, and the Multiverse: The Quest for the Quantum Computer (ISBN: 0684814811), by Julian Brown, Simon & Schuster, 2000.
  2. e: The Story of a Number (ISBN: 0691058547), by Eli Maor, Princeton University Press, 1998.
  3. Early Astronomy (ISBN: 0387948228), by Hugh Thurston, Springer, 1994.
Useful free software:
  1. MIT Photonic Bands, a frequency-domain band (dispersion) and electromagnetic mode solver for periodic dielectric structures
  2. MEEP, a finite-difference time-domain (FDTD) simulation software package
  3. POV-Ray, an open-source ray tracing program that can create photorealistic images of complex scenes. It is capable of handling negative-index materials.
  4. MegaPOV, unofficial extensions to the above program to enhance photorealism
Journal publications from the research group since 2008:
  1. A. Akbarzadeh, M. Danesh, C. Qiu, and A. J. Danner, "Tracing optical force fields within graded-index media," [FULL TEXT] New Journal of Physics, Vol. 16, May 2014.
  2. J. Huang, K. H. P. Tung, L. Deng, N. Xiang, J. Dong, A. J. Danner, and J. Teng, "Surface plasmon enchanced photoluminescence in gold capped InGaAs quantum well nanodisk array," [FULL TEXT] Optical Materials Express, Vol. 3, Issue 3, P. 2003-2011, 2013.
  3. G. Si, Y. Zhao, J. Lv, M. Lu, F. Wang, H. Liu, N. Xiang, T. J. Huang, A. J. Danner, J. Teng, and Y. J. Liu, "Reflective plasmonic color filters based on lithographically patterned silver nanorod arrays," [FULL TEXT] Nanoscale, Vol. 5, No. 14, 2013.
  4. A. Akbarzadeh, A. J. Danner, C. Qiu, "Exploiting design freedom in biaxial dielectrics to enable spatially overlapping optical instruments," [FULL TEXT] Scientific Report, No. 3, p. 2055, 2013.
  5. J. Deng, S. Hussain, V. S. Kumar, W. Jia, C. E. Peng, T. S. Lim, A. A. Bettiol, A. J. Danner, "Modeling and experimental investigations of Fano resonances in free-standing LiNbO3 photonic crystal slabs," [FULL TEXT] Optics Express, Vol. 21, Issue 3, p. 3243-3252, 2013.
  6. J. Son, M Sakhuja, A.J. Danner, C.S. Bhatia and H. Yang, “Large scale antireflective glass texturing using grid contacts in anodization methods”, Solar Energy Materials and Solar Cells, Vol. 116, 09-13, 2013.
  7. C. Huang, L. Lou, A. J. Danner and C. Lee, "Transparent force sensing arrays with low power consumption using liquid crystal arrays," Sensor and Actuators A: Physical, Vol. 190, No. 1, P. 136-140, 2012.
  8. Jia, W., J. Deng, H. Wu, B. P. L. Reid, X. Wang, C. C. S. Chan, R. A. Taylor, X. Y. Li, and A. J. Danner, "Design and fabrication of optical filters with very large stopband (>500 nm) and small passband (1 nm) in silicon-on-insulator," Photonics and Nanostructures, Vol. 10, No. 4, 2012.
  9. Ho, C. P., B. Li, A. J. Danner, and C. Lee, "Design and modeling of 2-D photonic crystals based hexagonal triple-nano-ring resonators as biosensors." Microsystems Technologies, 2012.
  10. Koh, K. H., B. W. Soon, J. M. Tsai, A. J. Danner, and C. Lee, "Study of Hybrid-Driven Micromirrors for 3-D Variable Optical Attenuator (VOA) Applications," [FULL TEXT] Optics Express, Vol. 20, No. 19, 2012.
  11. M. Sakhuja, J. Son, L.K. Verma, H. Yang, C.S. Bhatia and A.J. Danner, "Omnidirectional Study of Nanostructured Glass Packaging for Solar Modules", Progress in Photovoltaics: Research and Applications, 22, 3, 356-361 (2012).
  12. Liang, G. Q., A. J. Danner, and C. Lee, "Design of curved photonic cavities for a narrow-band widely tunable resonance ranging 200 nm," [FULL TEXT] Optics Express, Vol. 20, No. 17, 2012.
  13. Tyc, T. and A. J. Danner, "Frequency spectra of absolute optical instruments," [FULL TEXT] New Journal of Physics, 14, No. 8, 2012.
  14. Liu, Y. J., G. Y. Si, E. S. P. Leong, N. Xiang, A. J. Danner, and J. H. Teng, "Light-driven plasmonic color filters by overlaying photoresponsive liquid crystals on gold annular aperture arrays," Advanced Materials, 24, No. 23, 2012.
  15. Lee Qing Xian, Stephen Wittkopf, Aaron Danner, Yang Xiaoming, and Ouyang Jieer, "Using modeled and measured BSDF data in Radiance - A qualitative and quantitave comparison," Solar Energy Materials and Solar Cells, 98, 2012.
  16. Y. J. Liu, G. Y. Si, E. S. P. Leong, B. Wang, A. J. Danner, X. C. Yuan and J. H. Teng, "Optically tunable plasmonic color filters," Invited Paper, [FULL TEXT] Applied Physics A, 107, No. 1, 49-54, 2012.
  17. Deng, J., W. Jia, C. E. Png, G. Y. Si, J. S. Son, H. Yang, and A. J. Danner, "Deep anisotropic LiNbO3 etching with SF6/Ar inductively coupled plasmas," J. Vac. Sci. Technol. B, vol. 30, no. 1, p. 011208 (6 pages), 2012.
  18. G. Q. Liang, C. Lee, and A. J. Danner, "Design of Narrow band photonic filter with compact MEMS for tunable resonant wavelength ranging 100 nm," [FULL TEXT] AIP Advances, Vol. 1, no. 4, 042171, 2011. Also selected to appear in the Virtual Journal of Nanoscale Science & Technology, Vol. 25, No. 1, 2012 (Micro and Nano Electromechanical Systems).
  19. Tanoto, H., J. H. Teng, Q. Y. Wu, M. Sun, Z. N. Chen, S. A. Maier, B. Wang, C. C. Chum, G. Y. Si, A. J. Danner, and S. J. Chua, "Greatly enhanced continuous-wave terahertz emission by nano-electrodes in a photoconductive photomixer", Nature Photonics, 6, 121-126, 2012. Retracted 08 March 2013.
  20. A. J. Danner, T. Tyc, and U. Leonhardt, "Controlling birefringence in dielectrics," Nature Photonics, vol. 5, no. 6, pp. 357-359, 2011. Popular press article published: A. J. Danner, "Gradient Birefringent Lenses: A New Degree of Freedom in Optics," [FULL TEXT] www.2physics.com, Nov. 6, 2011.
  21. Chengwei Qiu, Alireza Akhbarzadeh, Tiancheng Han, and Aaron Danner, "Photorealistic Rendering of a Graded Negative-Index Metamaterial Magnifier,"[FULL TEXT] New Journal of Physics, vol. 14, article 033024, 2012.
  22. Wei Jia, Jun Deng, Hong Wu, Xiangyin Li, and Aaron J. Danner, "Design and fabrication of high-efficiency photonic crystal power beam splitters," Optics Letters, vol. 36, no. 20, pp. 4077-4079, 2011.
  23. Wei Jia, Jun Deng, M. S. Ajeesh, Hong Wu, Jiang Liyong, Li Xiangyin, C. S. Bhatia, H. Yang, and A. J. Danner, "Design and fabrication of high efficiency power coupler between different photonic crystal waveguides," Applied Physics Letters, vol. 98, no. 24, 2011.
  24. G. Y. Si, Y. H. Zhao, H. Liu, S. L. Teo, M. S. Zhang, T. J. Huang, A. J. Danner, and J. H. Teng, "Annular aperture array based color filter," Applied Physics Letters, vol. 99, pp. 033105-033107, 2011. Selected for the August 2011 issue of Virtual Journal of Ultrafast Science [FULL TEXT]
  25. Bing Wang, Ah Bian Chew, Jinghua Teng, Guangyuan Si, and Aaron J. Danner, "Subwavelength lithography by waveguide mode interference," Applied Physics Letters, vol. 99, no. 15, pp. 151106-1 to 151106-3, 2011.
  26. Y. J. Liu, G. Y. Si, Eunice S. P. Leong, N. Xiang, A. J. Danner, and J. H. Teng, "Light-Driven Plasmonic Color Filters by Overlaying Photoresponsive Liquid Crystals on Gold Annular Aperture Arrays," Advanced Materials, 24, No. 23, 2012.
  27. Kent D. Choquette, Dominic Siriani, Ansas Kasten, Meng Peun Tan, Joshua Sulkin, Paul Leisher, James Raftery, and Aaron Danner, "Single mode photonic crystal vertical cavity surface emitting lasers," [FULL TEXT] Advances in Optical Technologies, vol. 2012, Article ID 280920, 8 pages, Hindawi, 2012.
  28. Jaesung Son, Shreya Kundu, Lalit K. Verma, Mridul Sakhuja, Aaron J. Danner, Charanjit S. Bhatia, and Hyunsoo Yang, "A practical superhydrophilic self cleaning and antireflective surface for outdoor photovoltaic applications," Solar Energy Materials and Solar Cells, vol. 98, pp. 46-51, March 2012.
  29. Xi Baojuan, Verma Lalit Kumar, Jing Li, Charanjit Singh Bhatia, Hyunsoo Yang, Aaron Danner, Hua Chun Zeng, “TiO2 thin films prepared via adsorptive self-assembly for self-cleaning omnidirectional solar cells,” ACS Applied Materials & Interfaces, 4, No. 2, 1093-1102, 2012.
  30. L. K. Verma, M. Sakhuja, J. Son, A. J. Danner, H. Yang, H. C. Zeng, and C. S. Bhatia, “Self-cleaning and antireflective packaging glass for solar modules,” Renewable Energy, vol. 36, no. 9, pp. 2489 - 2493, September 2011.
  31. Guangyuan Si, Aaron J. Danner, Siew Lang Teo, Ee Jin Teo, Jinghua Teng, and Andrew A. Bettiol, “Photonic crystal structures with ultrahigh aspect ratio in lithium niobate fabricated by focused ion beam milling,” J. Vac. Sci. Techno. B, vol. 29, no. 2, pp. 021205 - 021209, Mar/Apr 2011.
  32. Maoqing Xin, Ching Eng Png, and Aaron J. Danner, “Breakdown delay-based depletion mode silicon modulator with photonic hybrid-lattice resonator,” [FULL TEXT] Optics Express, vol. 19, no. 6, pp. 5063 - 5076, 2011.
  33. Jaesung Son, Lalit Kumar Verma, Aaron James Danner, Charanjit Singh Bhatia, and Hyunsoo Yang, “Enhancement of optical transmission with random nanohole structures,” [FULL TEXT] Optics Express, vol. 19, no. S1, pp. A35 - A40, 2011.
  34. A. Akbarzadeh and A. J. Danner, “Generalization of ray tracing in a linear inhomogeneous anisotropic medium: a coordinate-free approach,” J. Opt. Soc. Am. A, vol. 27, no. 12, pp. 2558 - 2562, 2010.
  35. M. Q. Xin, C. E. Png, S. T. Lim, V. Dixit, and A. J. Danner “High speed electro-optic phase shifter based on a lateral P-G-N diode capacitor,” [FULL TEXT] Optics Express, vol. 19, no. 15, pp. 14354 - 14369, 2011. Winner of 2010 IEEE Region 10 (Asia Pacific) Student Paper Contest.
  36. A. J. Danner, “Singularity removal in optical instruments without reflections or induced birefringence,” [FULL TEXT] New J. of Physics, vol. 12, 113008, 8 pages, November 2010.
  37. S. T. Lim, C. E. Png, and A. J. Danner, “Embedded air core optical nano-waveguides,” [FULL TEXT] J. Opt. Soc. Am. B, vol. 27, no. 10, pp. 1937 - 1941, October 2010. Also selected to appear in the Virtual Journal of Nanoscale Science & Technology, vol. 22, no. 18, 2010.
  38. L. Zhang, M. Q. Xin, J. H. Teng, and S. J. Chua, “Photonic band structure of nanoporous anodized aluminum oxide with radius-to-period ratio modulation,” Comput. Mater. Sci., vol. 49, no. 1, S153-S156, July 2010.
  39. G. Y. Si, A. J. Danner, J. H. Teng, S. S. Ang, A. B. Chew, E. Dogheche, “Nanoscale arrays in lithium niobate fabricated by interference lithography and dry etching,” International J. of Nanoscience, vol. 9, no. 4, pp. 311-315, August 2010.
  40. M. Xin, L. Zhang, C. E. Png, J. H. Teng, and A. J. Danner, “Asymmetric open cavities for beam steering and switching from line-defect photonic crystals,” J. Opt. Soc. Am. B, vol. 27, no. 6, pp. 1153 - 1157, June 2010.
  41. H. Liu, B. Wang, E. S. P. Leong, P. Yang, Y. Zong, G. Si, J. Teng, and S. A. Maier, “Enhanced surface plasmon resonance on a smooth silver film with a seed growth layer,” ACSNano, vol. 4, no. 6, pp. 3139 - 3146, June 2010.
  42. G. Si, E. J. Teo, A. A. Bettiol, J. Teng, and A. J. Danner, “Suspended slab and photonic crystal waveguides in lithium niobate,” J. Vac. Sci. Techno. B, vol. 28, no. 2, pp. 316 - 320, Mar/Apr 2010.
  43. A. J. Danner, “Visualizing invisibility: Metamaterials-based optical devices in natural environments,” [FULL TEXT] Optics Express, vol. 18, no. 4, pp. 3332 - 3337, 2010.
  44. M. Xin, A. J. Danner, C. E. Png, S. T. Lim, “Resonator-based silicon electro-optic modulator with low power consumption,” Jap. J. of Appl. Phys., vol. 48, pp. 04C104-1 - 04C104-5, 2009.
  45. M. Xin, A. J. Danner, C. E. Png, and S. T. Lim, “Theoretical study of a cross-waveguide resonator-based silicon electro-optic modulator with low power consumption,” J. Opt. Soc. Am. B, vol. 26, no. 11, pp. 2176 - 2180, 2009.
  46. D. F. Siriani, M. P. Tan, A. M. Kasten, A. C. L. Harren, P. O. Leisher, J. D. Sulkin, J. J. Raftery, Jr., A. J. Danner, A. V. Giannopoulos, and K. D. Choquette, “Mode control in photonic crystal vertical-cavity surface-emitting lasers and coherent arrays,” IEEE J. of Sel. Topics in Quant. Elect., vol. 15, no. 3, 909, 2009.
  47. A. J. Danner, "Photorealistic ray tracing aids understanding of metamaterials," [FULL TEXT] SPIE Newsroom, March 12, 2009.
  48. A. J. Danner, S. J. Chua, B. Z. Wong, and J. K. Hwang, “Fabrication of efficient light-emitting diodes with a self-assembled photonic crystal array of polystyrene nanoparticles,” IEEE Photon. Tech. Lett., vol. 20, no. 1, 2008.
  49. C. E. Png, G. H. Park, S. T. Lim, E. P. Li, A. J. Danner, K. Ogawa, and Y. T. Tan, “Electrically controlled silicon-based photonic crystal chromatic dispersion compensator with ultralow power consumption,” Appl. Phys. Lett., vol. 93, no. 1, pp. 061111 – 061113, 2008.
Books/book chapters from the research group since 2008:
  1. C. S. Bhatia, E. R. Yazdi, S. K. Sinha, and A. J. Danner, “Applications of DLC in magnetic recording tribology,” to appear in Encyclopedia of Tribology, ed. by Y. W. Chung, Springer, 2013.
Conference presentations from the research group since 2008:
  1. A. Akbarzadeh, C. Qiu, and A. J. Danner, "Force tracing versus ray tracing," International Conference on Metamaterials, Photonic Crystals and Plasmonics (META), Nanyang Technological University (NTU), Singapore, May 20-23, 2014.
  2. A. Akbarzadeh, C. Qiu, T. Tyc, and A. J. Danner, "Visualization of Pulse Propagation and Optical Force in Graded-index Optical Devices," the 34th Progress in Electromagnetic Research Symposium (PIERS), Stockholm, Sweden, August 12-15, 2013 [INVITED]
  3. T. S. Lim, M. Xin, C. E. Png, V. Dixit, and A. J. Danner, "Hybrid silicon organic high speed electro-optic phase shifter," Physics and Simulation of Optoelectronic Devices XXI, Moscone Convention Center, San Francisco, USA, 2013.
  4. J. Deng, S. Hussain, S. Saha, C. E. Png, M. Tsang, and A. J. Danner, "Optical microring resonators in lithium niobate for classical and quantum microwave photonics," IEEE Conference on Optical MEMS & Nanophotonics, Kanazawa, Japan, 2013.
  5. J. Deng, V. S. Kumar, S. Hussain, H. Gao, T. S. Lim, C. E. Png, X. Ning, A. A. Bettiol, and A. J. Danner, "Free-standing monolithic LiNbO3 photonic crystal slabs," Proceedings of SPIE Photonics West 8632, Photonic and Phononic Properties of Engineered Nanostructures III, 86320H, San Francisco, USA, 2013.
  6. J. Deng, W. Jia, V. S. Kumar, C. E. Png, A. A. Bettiol, and A. J. Danner, "Photonic crystals in proton-exchanged LiNbO3 waveguides for photonic applications, " IEEE Photonics Global Conference, Singapore, 2012.
  7. M. Sakhuja, H. Yang, C.S. Bhatia, and A.J. Danner, “Antireflective and self-cleaning glass for solar modules: Investigation of outdoor performance and durability”, International Photovoltaic Science and Engineering Conference 23 (PVSEC 23), October 28 – Novermber 1, 2013, Taipei, Taiwan. (Oral presentation and conference paper).
  8. M. Sakhuja, C.Z. Yap, G. Perera, H.M. Teng, C.M. Maung, L.J. George, S.H. Shin, E. s/o Dayalan, L.T. Tan, and A.J. Danner, “Photocatalytic activity of sputtered titanium dioxide on solar cell efficiency”, 2nd International Conference on Solar Energy Materials, Solar Cells and Solar Energy Applications, Solar Asia 2013, August 22 – 24, 2013, Kuala Lumpur, Malaysia. (Oral presentation)
  9. Jia, W. J. Deng, H. Wu, B. P. L. Reid, X. Wang, C. C. S. Chan, R. A. Taylor, X. Y. Li, and A. J. Danner, "Design and fabrication of optical filters with very large stopband (>500 nm) and small passband (1 nm) in silicon-on-insulator," TaCoNa-Photonics 2011, 26 October 2011. Published in Photonics and Nanostructures: Fundamentals and Applications, 10, No. 4, 2012. New York: Elsevier.
  10. M. Sakhuja, H. Yang, C.S. Bhatia, and A.J. Danner, “Antireflective and self-cleaning packaging glass for solar modules”. 27th European Photovoltaic Solar Energy Conference and Exhibition (EUPVSEC), September 24-28, 2012, Frankfurt, Germany. (Best Student Paper Award).
  11. Sajid Hussain, Charanjit Singh Bhatia, Hyunsoo Yang, and Aaron Danner, "Characterization of Nano-aperture VCSELs with FePt recording Media for Tb/in2 Density Heat Assisted Magnetic Recording," ICYRAM12-A-1157, ICYRAM 2012, 1-6 July, 2012, Matrix@Biopolis, Singapore, 2012.
  12. Mridul Sakhuja, Jaesong Son, Le Hong Vu, C. S. Bhatia, Hyunsoo Yang, and Aaron Danner, "Nanopatterned and self-cleaning glass substrates for solar cell packaging," India Singapore Joint Physics Symposium (ISJPS-2012), February 20-22, 2012, Senate Hall, IIT Delhi, Hauz Khas, New Delhi 110016, Session 8, IL-28, 2012.
  13. H. Tanoto, Q. Y. Wu, M. Sun, Z. N. Chen, B. Wang, S. L. Teo, C. C. Chum, S. A. Maier, G. Y. Si, L. Y. Deng, A. J. Danner, S. J. Chua, and J. H. Teng, "Nano-antenna for greatly enhanced THz emission in a photomixer," SPIE Photonics Europe, 2012.
  14. Yan Jun Liu, Guang Yuan Si, Eunice S. P. Leong, Ning Xiang, Aaron J. Danner, and Jing Hua Teng, "Optically tunable plasmonic color filters based on photoresponsive liquied crystals and gold annular aperture arrays," ICNP 2012, Beijing, China.
  15. Bing Wang, Yanjun Liu, Guangyuan Si, Eunice Leong, Ning Xiang, Aaron Danner, and Jing Hua Teng, "Plasmonic Brillouin Scattering and Filtering," IPS12, Institute of Physics Singapore, 23 - 24 February, 2012, Faculty of Science, National University of Singapore, Singapore.
  16. Jaesung Son, Aaron J. Danner, Charanjit S. Bhatia, and Hyunsoo Yang, “Nanostructure based self-cleaning and antireflective glass surface for photovoltaic packaging applications” (poster) BIT annual world congress of Nano-S&T, Oct 23-26 2011, World EXPO center, Dalian, China.
  17. M. Sakhuja, L.K. Verma, J. Son, L. H. Vu, X. Baojuan, H.C. Zeng, H. Yang, A.J. Danner, C.S. Bhatia, "Nanopatterned and self-cleaning glass substrates for solar cell packaging," The 2nd International Conference on Control, Instrumentation, and Automation (ICCIA), Shiraz, Iran, paper 1569518603, December 27-29, 2011.
  18. U. Leonhardt, T. Tyc, and A. J. Danner, "Perfect imaging with positive refraction," 3rd International Workshop on Theoretical and Computational Nano-Photonics (Tacona-Photonics 2010), 3 - 5 Nov 2010, Physikzentrum, Bad Honnef, Germany. AIP Conference Proceedings, vol. 1291, pp. 22-24, 2010.
  19. C. E. Png, S. T. Lim, E. P. Li, and A. J. Danner, "Third order silicon (Si) nitride side-walled grating using silicon-on-insulator," 2010 Asia Communications and Photonics Conference and Exhibition (ACP 2010), 8 - 12 Dec, 2010, Shanghai Convention Center, Shanghai, China, vol. 7986. Proceedings of SPIE (2011), Art. no. 79860I.
  20. Baochen Liao et al., "Ultrafine and high aspect ratio metal lines by electron beam lithography for silicon solar cell metallisation," Energy Procedia, 15, 91-96, 2012.
  21. Alireza Akbarzadeh, Cheng-Wei Qiu, and Aaron J. Danner, "Biaxial anisotropy in gradient permittivity dielectric optical instruments," PIERS 2012, Kuala Lumpur, 2012.
  22. Alireza Akbardadeh, Tiancheng Han, Aaron J. Danner, and Cheng-Wei Qiu, "Generalization of superscatterer design and photorealistic raytracing thereof," PIERS 2012, Kuala Lumpur, 2012.
  23. Lay Theng Tan, Chee Zhen Yap, Hui Min Teng, Chan Myee Maung, Lalit Kumar Verma, Hyunsoo Yang, Charanjit Singh Bhatia, and Aaron J. Danner, “Anti-dust coatings for solar cells and the impact of dust accumulation on solar cell efficiency in singapore,” ICMAT 2011 (poster presentation), ICMAT11-A-1600 (O-PO3-16), Suntec Convention Centre, Singapore, June 26 - July 1, 2011.
  24. Hong LIU, Lin KE, Jie DENG, Chan Choy CHUM, Ming Shen ZHANG, Lu SHEN, Guang Yuan SI, Aaron DANNER, Stefan MAIER, Jinghua TENG, “A High Contrast Silver/Nickel Superlens Characterized by Photon Scanning Tunneling Microscopy,” ICMAT 2011 (oral presentation), ICMAT11-A-1641 (S3-5), Suntec Convention Centre, Singapore, June 26 - July 1, 2011.
  25. Y J LIU, Guang Yuan SI, Eunice SP LEONG, Bing WANG, Aaron DANNER, Xiaocong YUAN, Jinghua TENG, “Optically Tunable Plasmonic Color Filters,” to be presented at ICMAT 2011 (oral presentation), ICMAT11-A-3487 (S9-6), Suntec Convention Centre, Singapore, June 26 - July 1, 2011.
  26. Baojuan XI, Lalit Kumar VERMA, Hyunsoo YANG, Aaron DANNER, Charanjit Singh BHATIA, Hua Chun ZENG, “Photoassisted Synthesis of Ag Nanoparticles on Tio2 Films,” to be presented at ICMAT 2011 (oral presentation), ICMAT11-A-4144 (B5-6), Suntec Convention Centre, Singapore, June 26 - July 1, 2011.
  27. Mridul SAKHUJA, Lalit Kumar VERMA, Hyunsoo YANG, Charanjit Singh BHATIA, Aaron DANNER, “Parameter Optimization of Nanostructured Glass for Solar Cell Packaging,” to be presented at ICMAT 2011 (poster presentation), (O-PO3-48), Suntec Convention Centre, Singapore, June 26 - July 1, 2011.
  28. Jia Yun HEE, Lalit Kumar VERMA, Aaron DANNER, Hyunsoo YANG, Charanjit Singh BHATIA, “The Effect of Dust on Transmission and Self-cleaning Property of Solar Panels,” to be presented at ICMAT 2011 (poster presentation), ICMAT11-A-4688 (O-PO3-55), Suntec Convention Centre, Singapore, June 26 - July 1, 2011.
  29. Baochen LIAO, Armin ABERLE, Thomas MUELLER, Lalit Kumar VERMA, Aaron DANNER, Hyunsoo YANG, and Charanjit Singh BHATIA, “Ultrafine and High Aspect Ratio Metal Lines by Electron Beam Lithography for Silicon Solar Cell Metallization,” to be presented at ICMAT 2011 (poster presentation), (O-PO3-49), Suntec Convention Centre, Singapore, June 26 - July 1, 2011.
  30. M. Sakhuja, L. K. Verma, H. Yang, C. S. Bhatia, and A. J. Danner, "Fabrication of tilted nanostructures for omnidirectional transmission in solar modules," Proceedings of the 37th IEEE Photovoltaic Specialists Conference, 19 - 24 June 2011, Seattle, Washington, USA, pp. 000932 - 000935, 2011.
  31. Susanne C. Kehr, Sahar Sahebdivan, Thomas Philbin, Ulf Leonhardt, Aaron J. Danner, Tomas Tyc, and Yungui Ma, “Sub-diffraction imaging in the far-field by positive index materials,” 3rd International Topical Meeting on Nanophotonics and Metamaterials (NANOMETA 2011), Seefeld Ski Resort, Tirol Austria, January 3 - 6, 2011.
  32. G. Si, E. L. S. Ping, A. J. Danner, and J. Teng, “Plasmonic coaxial Fabry-Pérot nanocavity color filter,” [7757-127] PS1, SPIE Optics + Photonics 2010, San Diego, California USA (San Diego Convention Center), August 1 - 5, 2010. Proceedings of SPIE, vol. 7757, Art. no. 77573F.
  33. M. Xin, C. E. Png, A. J. Danner, “A compact depletion mode silicon modulator based on a photonic hybrid-lattice mode-gap resonator,” presented at SPIE Photonics West (OPTO), 7943-43, San Francisco, California USA (The Moscone Center), January 22 - 27, 2010. Proceedings: Silicon Photonics VI, ed. by Joel A. Kubby, Graham T. Reed, Proc. of SPIE Vol. 7943, pp. 794318-1 - 794318-7, 2011.
  34. T. Tyc, A. Danner, and U. Leonhardt, “Perfect lenses with positive refractive index,” to be presented at Metamaterials 2010 (Fourth International Congress on Advanced Electromagnetic Materials in Microwaves and Optics, Karlsruhe Institute of Technology), Karlsruhe, Germany, September 13 - 16, 2010.
  35. S. T. Lim, J. Zhang, J. Png, and A. Danner, “High-Q 1D photonic nanocavity on ring resonators,” Photonics Global 2010, (Suntec Convention Center), Singapore, December 14 - 16, 2010.
  36. J. Deng, G. Si, and A. J. Danner, “Dry etching of LiNbO3 using inductively coupled plasma,” Photonics Global 2010, (Suntec Convention Center), Singapore, December 14 - 16, 2010. Article no. 5706006.
  37. G. Si, E. J. Teo, D. Jun, A. A. Bettiol, J. Teng, and A. J. Danner, “Improved profiles of photonic crystals in lithium niobate by truncating tapered bottoms,” Photonics Global 2010, (Suntec Convention Center), Singapore, December 14 - 16, 2010.
  38. G. Si, M. Zhang, S. L. Teo, J. Deng, J. Teng, and A. J. Danner, “Fabrication of single-layer metamaterials with sub-50-nm ultrasmall gaps,” Photonics Global 2010, (Suntec Convention Center), Singapore, December 14 - 16, 2010. Article no. 5706013.
  39. G. Si, M. Zhang, S. L. Teo, J. Deng, A. J. Danner, and J. Teng, “Tuning of surface plasmons in visible and near infrared range using plasmonic crystals,” Photonics Global 2010, (Suntec Convention Center), Singapore, December 14 - 16, 2010. Article no. 5706014.
  40. M. Sakhuja, L. Benaissa, L. K. Verma, C. S. Bhatia, A. J. Danner, and H. Yang, “EBIC characterization for direct extraction of diffusion length of semiconducting materials,” MRS-S Trilateral Conference on Advances in Nanoscience: Energy, Water and Healthcare, (IMRE), Singapore, August 11 - 13, 2010.
  41. A. Kumar, D. Z. Chi, A. J. Danner, H. Yang, and C. S. Bhatia, “Earth abundant β-FeSi2 for thin film photovoltaics,” Best Poster Award, MRS-S Trilateral Conference on Advances in Nanoscience: Energy, Water and Healthcare, (IMRE), Singapore, August 11 - 13, 2010.
  42. J. Son, L. K. Verma, A. J. Danner, C. S. Bhatia, and H. Yang, “Enhancement of optical transmission by randomly distributed nanoholes for solar cell application,” MRS-S Trilateral Conference on Advances in Nanoscience: Energy, Water and Healthcare, (IMRE), Singapore, August 11 - 13, 2010.
  43. L. K. Verma, A. Kumar, J. S. Son, C. S. Bhatia, A. Danner, and H. Yang, “Nanostructured solar glass with enhanced transmission,” MRS-S Trilateral Conference on Advances in Nanoscience: Energy, Water and Healthcare, (IMRE), Singapore, August 11 - 13, 2010.
  44. S. Gupta, L. Benaissa, D. Nagalingam, M. Lei, A. Danner, H. Yang, and C. S. Bhatia, “EBIC and SEAM for 3D mapping of solar cells defects,” MRS-S Trilateral Conference on Advances in Nanoscience: Energy, Water and Healthcare, (IMRE), Singapore, August 11 - 13, 2010.
  45. Ajeesh M. Sahadevan, Jae S. Son, Hyunsoo Yang, Aaron J. Danner, and Charanjit S. Bhatia, “Substrate bias effect on AlOx based magnetic tunnel junctions grown on Ge buffer layers,” ISAMMA 2010 (2nd International Symposium on Advanced Magnetic Materials and Applications," Sendai, Japan (Sendai International Center), July 12 - 16, 2010. Proceedings: Journal of Physics: Conference Series, vol. 266, 012105, pp. 1 - 5, doi:10.1088/1742-6596/266/1/012105, 2011.
  46. A. Kumar, L. K. Verma, H. Yang, A. J. Danner, D. Chi, and C. S. Bhatia, “Semiconducting β-FeSi2 for high-efficiency photovoltaics,” to be presented at 25th EU-PVSEC/WCPEC-5 (25th European Photovoltaic Solar Energy Conference and Exhibition/5th World Conference on Photovoltaic Energy Conversion), IDV.3.72, Valencia, Spain (Feria Valencia), September 6 - 10, 2010.
  47. A. Kumar, L. K. Verma, H. Yang, A. J. Danner, D. Chi, and C. S. Bhatia, “Semiconducting β-FeSi2 for low cost and high conversion efficiency photovoltaics,” PVSC-35 (35th IEEE Photovoltaic Specialists Conference), Honolulu, Hawaii, USA (Hawaiian Convention Center in Waikiki, Hawaii), June 20 - 25, 2010.
  48. J. Son, K. V. Lalit, A. Danner, C. S. Bhatia, and H. Yang, “Omnidirectional optical transmission by optimized nano-structures of solar cells,” PVSC-35 (35th IEEE Photovoltaic Specialists Conference), Honolulu, Hawaii, USA (Hawaiian Convention Center in Waikiki, Hawaii), June 20 - 25, 2010.
  49. U. Leonhardt and A. Danner (invited), “Non-Euclidean transformation optics,” CIMTEC 2010/5th Forum on New Materials, FM-5:IL07, Montecatini Terme, Italy (Vittoria Congressi), June 13 - 18, 2010.
  50. J. Son, K. V. Lalit, A. Danner, C. S. Bhatia, and H. Yang, “Optimization of the surface nanostructure for photovoltaic devices,” 4th MRS-S Conference on Advanced Materials, IMRE, Singapore, March 17 - 19, 2010.
  51. N. Xiang, K. H. Tung, and A. J. Danner, “Surface plasmon enhanced emission from InGaAs quantum wells by nano-patterned metal dots,” META'10 (2nd International Conference on Metamaterials, Photonic Crystals and Plasmonics), Cairo, Egypt, Feb. 22 - 25, 2010.
  52. S. T. Lim, C. E. Png, M. Xin, and A. Danner, “Widely tunable optical nanocavity photonic crystal sensor,” ECIO 2010 (15th European Conference on Integrated Optics, University of Cambridge), EwP02, Cambridge, UK, April 7 - 9, 2010.
  53. A. J. Danner and N. Xiang, “Photorealistic depictions of Maxwell's fish eye and other gradient index metamaterials-based objects,” META'10 (2nd International Conference on Metamaterials, Photonic Crystals and Plasmonics), Cairo, Egypt, Feb. 22 - 25, 2010.
  54. A. J. Danner, “Photorealistic rendering of metamaterials, gradient index devices, and polarization-dependent invisibility cloaks,” OSA 93rd Annual Meeting: Frontiers in Optics, San Jose, CA, USA, Oct. 11 - 15, 2009.
  55. G. Si, A. J. Danner, J. H. Teng, S. S. Ang, and A. B. Chew, “Nanoscale arrays of lithium niobate fabricated by interference lithography and dry etching,” ICMAT 2009, Singapore: Materials Research Society, June 28 - July 3, 2009.
  56. M. Xin, A. J. Danner, C. E. Png, and S. T. Lim, “Compact silicon electro-optic modulator based on a cross waveguide resonator,” ICMAT 2009, Singapore: Materials Research Society, June 28 - July 3, 2009.
  57. M. Xin, A. J. Danner, C. E. Png, and S. T. Lim, “Cross waveguide resonator-based silicon electro-optic modulator with low power consumption,” Nano Photonics Down Under - Devices and Applications, Melbourne: Swinburne University of Technology, SMONP 2009, June 21 - 24, 2009.
  58. A. J. Danner and U. Leonhardt, “Lossless design of an Eaton lens and invisible sphere by transformation optics with no bandwidth limitation,” presented at CLEO (Conference on Lasers and Electro-Optics), Baltimore, MD, USA, May 7 - June 5, 2009.
  59. A. J. Danner, “Surface texturing in LEDs,” (invited) Workshop on the Research Frontiers in Solid State Lighting, Singapore: Nanyang Technological University, Dec. 1, 2009.
  60. C. E. Png, G. H. Park, S. T. Lim, E. P. Li, A. J. Danner, M. B. Yu, K. Ogawa, and Y. T. Tan, “Electrically controlled silicon photonic crystal-based chromatic dispersion compensator with ultra low power consumption,” presented at CLEO (Conference on Lasers and Electro-Optics), San Jose, CA, USA, May 4 - 9, 2008.
  61. M. Xin, A. J. Danner, C. E. Png, and S. T. Lim, “A resonator-based silicon electro-optic modulator with low power consumption and optimized modulation performance,” IEEE Photonics Global, Singapore, Dec. 8 - 11, 2008.
  62. G. Si, J. H. Teng, A. J. Danner, E. Dogheche, R. Yin, S. S. Ang, M. Y. Lai, A. Gokarna, A. Stolz, D. Decoster, and S. Y. Tan, “Fabrication and characterization of proton-exchanged waveguide on x-cut LiNbO3,” IEEE Photonics Global, Singapore, Dec. 8 - 11, 2008.
  63. G. Si, H. She, J. H. Teng, and A. J. Danner, “Enhanced interaction of plasmonic nanocylinders and other cylindrical structures,” International Symposium on Antennas and Propagation, Taipei: Yuan Ze University and Oriental Institute of Technology, Oct. 27 - 30, 2008.
  64. M. Xin, A. J. Danner, and C. E. Png, “Resonator-based silicon electro-optic modulator with ultra-low power consumption,” International Conference on Solid State Devices and Materials, Tsukuba, Japan, Sept. 23 - 26, 2008.
  65. A. J. Danner, “Photonic Crystals,” (invited) India-Singapore Symposium on current trends in physics, IIT Madras, Chennai, India, Feb. 8 - March 1, 2008.
Prof. Danner's journal publications prior to joining NUS:
  1. A. J. Danner, J. J. Raftery, Jr., P. O. Leisher, and K. D. Choquette, “Single mode photonic crystal vertical cavity lasers,” Appl. Phys. Lett., vol. 88, no. 9, pp. 091114 – 091116, 2006.
  2. P. O. Leisher, A. J. Danner, J. J. Raftery, Jr., D. Siriani, and K. D. Choquette, “Loss and index guiding in single-mode proton-implanted holey vertical-cavity surface-emitting lasers,” IEEE J. of Quant. Elect., vol. 42, no. 10, pp. 1091 – 1096, 2006.
  3. P. O. Leisher, A. J. Danner, and K. D. Choquette, “Single-mode 1.3-mm photonic crystal vertical-cavity surface-emitting laser,” IEEE Photon. Tech. Lett., vol. 18, no. 20, pp. 2156 – 2158, 2006.
  4. T. Kim, P. O. Leisher, A. J. Danner, R. Wirth, K. Streubel, and K. D. Choquette, “Photonic crystal structure effect on the enhancement in the external quantum efficiency of a red LED,” IEEE Photon. Tech. Lett., vol. 18, no. 17, pp. 1876 – 1878, 2006.
  5. J. J. Raftery, Jr., A. C. Lehman, A. J. Danner, P. O. Leisher, A. V. Giannopoulos, and K. D. Choquette, “In-phase evanescent coupling of two-dimensional arrays of defect cavities in photonic crystal vertical cavity surface emitting lasers,” Appl. Phys. Lett., vol. 89, no. 8, pp. 081119 – 081121, 2006.
  6. A. C. Lehman, J. J. Raftery, Jr., A. J. Danner, P. O. Leisher, and K. D. Choquette, “Relative phase tuning of coupled defects in photonic crystal vertical cavity surface emitting lasers,” Appl. Phys. Lett., vol. 88, no. 2, pp. 021102 – 021103, 2006.
  7. A. J. Danner, J. J. Raftery, Jr., T. Kim, P. O. Leisher, A. V. Giannopoulos, and K. D. Choquette, “Progress in Photonic Crystal Vertical Cavity Lasers,” (invited) IEICE Transactions on Electronics, vol. E88-C, no. 5, pp. 944-950, May 2005.
  8. Y. K. Kim, A. J. Danner, J. J. Raftery, Jr., and K. D. Choquette, “Focused ion beam nanopatterning for optoelectronic device fabrication,” IEEE J. of Sel. Topics in Quant. Elect., vol. 11, no. 6, pp. 1292 – 1298, 2005.
  9. J. J. Raftery, Jr., A. C. Lehman, A. J. Danner, P. O. Leisher, A. V. Giannopoulos, and K. D. Choquette, "Coherent transverse coupling in photonic crystal vertical cavity laser arrays," C. Lei and K. D. Choquette; Editors, Proc. SPIE, vol. 6132, Vertical-Cavity Surface-Emitting Lasers X, 61320I (8 pages), 2006.
  10. J. J. Raftery, Jr., A. J. Danner, J. C. Lee, and K. D. Choquette, “Coherent coupling of two-dimensional arrays of defect cavities in photonic crystal vertical cavity surface-emitting lasers,” Appl. Phys. Lett., vol. 86, no. 20, pp. 201104-1 – 201104-3, 2005.
  11. T. S. Kim, A. J. Danner, and K. D. Choquette, “Enhancement in the external quantum efficiency of a blue light-emitting diode by a photonic crystal surface grating,” Electronics Letters, vol. 41, no. 20, pp. 1138 – 1139, 2005.
  12. P. O. Leisher, A. J. Danner, J. J. Raftery, Jr., and K. D. Choquette, “Proton implanted single mode holey vertical-cavity surface emitting lasers,” Electronics Letters, vol. 41, no. 18, pp. 1010 – 1011, 2005.
  13. A. J. Danner, T. S. Kim, and K. D. Choquette, “Single fundamental mode photonic crystal vertical cavity laser with improved output power,” Electronics Letters, vol. 41, no. 6, pp. 325 – 326, 2005.
  14. A. J. Danner, J. J. Raftery, Jr., N. Yokouchi, and K. D. Choquette, “Transverse modes of photonic crystal vertical-cavity lasers,” Appl. Phys. Lett., vol. 84, no. 7, pp. 1031-1033, 2004.
  15. T. S. Kim, A. J. Danner, D. M. Grasso, E. W. Young, and K. D. Choquette, “Single fundamental mode photonic crystal vertical cavity surface emitting laser with 9 GHz bandwidth,” Electronics Letters, vol. 40, no. 21, pp. 1340 - 1341, 2004.
  16. A. J. Danner, J. C. Lee, J. J. Raftery, Jr., and K. D. Choquette, “Photonic crystal vertical cavity lasers,” C. Lei, K. D. Choquette and S. P. Kilcoyne; Editors, Proc. SPIE, vol. 5364, Vertical-Cavity Surface-Emitting Lasers VIII, pp. 92 - 96, 2004.
  17. N. Yokouchi, A. J. Danner, and K. D. Choquette, “Two-dimensional photonic crystal confined vertical cavity surface emitting lasers,” J. of Sel. Topics in Quant. Elect., vol. 9, no. 5, 1439-1445, 2003.
  18. N. Yokouchi, A. J. Danner, and K. D. Choquette, “Vertical-cavity surface-emitting laser operating with photonic crystal seven-point defect structure,” Appl. Phys. Lett., vol. 82, no. 21, pp. 3608-3610, 2003.
  19. A. J. Danner, J. C. Lee, J. J. Raftery, Jr., N. Yokouchi, and K. D. Choquette, “Coupled-defect photonic crystal vertical cavity surface emitting lasers,” Electronics Letters, vol. 39, no. 18, pp. 1323 - 1324, 2003.
  20. N. Yokouchi, A. J. Danner, and K. D. Choquette, “Lateral mode control of vertical-cavity surface-emitting lasers using two-dimensional photonic crystal structure,” C. Lei, S. P. Kilcoyne; Editors, Proc. SPIE, vol. 4994, Vertical-Cavity Surface-Emitting Lasers VII, pp. 216 – 221, 2003.
  21. N. Yokouchi, A. J. Danner, and K. D. Choquette, “Etching depth dependence of the effective refractive index in 2-dimensional photonic crystal patterned vertical-cavity surface-emitting laser structure,” Appl. Phys. Lett., vol. 82, no. 9, pp. 1344-1346, 2003.
  22. A. Danner and F. Sonnemann, “Review of quench simulations for the protection of LHC main dipole magnets,” CERN publication LHC-ICP-00-199, European Organization for Nuclear Research, October, 1999.
Prof. Danner's conference presentations prior to joining NUS:
  1. A. J. Danner, J. K. Hwang, M. M. Sigalas, H. W. Wan, B. Z. Wang, and S. J. Chua, “Efficient light-emitting diodes fabricated with a spin-on photonic crystal surface grating,” presented at CLEO (Conference on Lasers and Electro-Optics), Long Beach, CA, USA, 2006.
  2. J. J. Raftery, Jr., A. J. Danner, A. C. Lehman, P. O. Leisher, A. V. Giannopoulos, K. D. Choquette, “A parametric study of coherent coupling in photonic crystal VCSELs with 2x1 arrangements of defect cavities,” presented at CLEO (Conference on Lasers and Electro-Optics), Long Beach, CA, USA, 2006.
  3. P. O. Leisher, D. F. Siriani, J. J. Raftery, Jr., A. J. Danner, and K. D. Choquette, “Loss and index guiding in single-mode holey vertical-cavity surface-emitting lasers,” presented at CLEO (Conference on Lasers and Electro-Optics), Long Beach, CA, USA, 2006.
  4. J. J. Raftery, Jr., A. C. Lehman, A. J. Danner, P. O. Leisher, A. V. Giannopoulos, and K. D. Choquette, "Coherent transverse coupling in photonic crystal vertical cavity laser arrays," presented at Photonics West, San Jose, CA, USA, Jan. 2005.
  5. J. J. Raftery, Jr., A. J. Danner, A. V. Giannopoulos, E. C. Shyu, and K. D. Choquette, “In-phase coherently coupled 2D arrays of defect cavities within a photonic crystal VCSEL” (invited), CLEO (Conference on Lasers and Electro-Optics), CThW5, Baltimore, MD, USA, 2005.
  6. K. D. Choquette, A. J. Danner, J. J.. Raftery, Jr., and P. O. Leisher, “Photonic crystal vertical cavity lasers and arrays,” (invited) 5th IEEE Conference on Nanotechnology, Proceedings, pp. 27 - 28, Nagoya, Japan, July 2005.
  7. K. D. Choquette, A. J. Danner, J. J.. Raftery, Jr., and P. O. Leisher, “Photonic crystal confined vertical cavity lasers and arrays,” (invited) Integrated Photonics Research and Applications, ItuG2, San Diego, CA, USA, April 2005.
  8. K. D. Choquette, A. J. Danner, J. J.. Raftery, Jr., and P. O. Leisher, “Photonic Crystal Vertical Cavity Lasers,” (invited) CLEO-PR (Conference on Lasers and Electro-Optics-Pacific Rim), CTuJ3-7-INV, Tokyo, Japan, July 2005.
  9. P. O. Leisher, A. J. Danner, J. J. Raftery, Jr., and K. D. Choquette, “Proton implanted single mode holey vertical-cavity surface-emitting lasers,” IEEE/LEOS (Lasers and Electro-Optics Society) 18th Annual Meeting, WC2, Sydney, Australia, 2005.
  10. K. D. Choquette, J. J. Raftery, Jr., A. J. Danner, and P. O. Leisher, “Coherently Coupled Photonic Crystal Vertical Cavity Lasers for Communication Applications,” IEEE Aerospace Conference, Big Sky, MT, USA March 2005.
  11. A. J. Danner, J. J. Raftery, Jr., P. O. Leisher, E. A. Yamaoka, S. R. Lala, M. L. Hwang, and K. D. Choquette, “Loss and the accuracy of the photonic crystal model in holey VCSELs,” CLEO (Conference on Lasers and Electro-Optics), CThW2, Baltimore, MD, USA, 2005.
  12. T. S. Kim, A. J. Danner (presenter), and K. D. Choquette, “Photonic Crystal GaN Light Emitting Diode,” CLEO (Conference on Lasers and Electro-Optics), CMR3, Baltimore, MD, USA, 2005.
  13. A. J. Danner, T. S. Kim, D. M. Grasso, E. Y. Young, and K. D. Choquette, “Small signal modulation of a single mode photonic crystal vertical cavity surface-emitting laser,” 19th International Semiconductor Laser Conference, Conference Digest, pp. 125 - 126, Matsue, Japan, Sept. 2004.
  14. A. J. Danner, “ホーリーVCSELの発振特性 (Lasing characteristics of photonic crystal vertical cavity lasers),” International Symposium on Optical Communications, Hakone, Japan, 2004.
  15. A. J. Danner, T. S. Kim, J. J. Raftery, Jr., and K. D. Choquette, “Optimization of photonic crystal vertical cavity lasers,” 9th Optoelectronics and Communications Conference (OECC), Yokohama, Japan, July 2004.
  16. K. D. Choquette, A. J. Danner, J. J. Raftery, Jr., and J. C. Lee, “Vertical cavity photonic crystal coupled-defect lasers for optical interconnects,” IEEE Aerospace Conference, Proceedings, vol. 3, pp. 1770 - 1775, Big Sky, MT, USA 2004.
  17. A. Danner, J. Raftery, P. Leisher, and K. D. Choquette, “Scaling characteristics of photonic crystal vertical-cavity lasers,” IEEE/LEOS (Lasers and Electro-Optics Society) 17th Annual Meeting, TuC4, Puerto Rico, 2004.
  18. A. J. Danner, J. J. Raftery, Jr., and K. D. Choquette, “High single mode power in photonic crystal vertical cavity lasers,” CLEO (Conference on Lasers and Electro-Optics), CTuP, San Francisco, CA, USA 2004.
  19. J. J. Raftery, Jr., A. J. Danner, J. C. Lee, and K. D. Choquette, “2-dimensional coherent arrays of photonic crystal vertical cavity defect lasers,” CLEO (Conference on Lasers and Electro-Optics), CTuR, San Francisco, CA, USA 2004.
  20. K. D. Choquette, A. J. Danner, J. C. Lee, and J. J. Raftery, Jr., “Photonic crystal vertical cavity lasers,” Photonics West, 5364-11, San Jose, CA, USA, Jan. 2004.
  21. K. D. Choquette, A. J. Danner, J. C. Lee, and J. J. Raftery, “Vertical cavity photonic crystal coupled-defect lasers”, International Symposium on Microelectronics, MEMS, and Nanotechnology Conference, 5277-22, Perth, Australia, Dec. 2003.
  22. A. J. Danner, J. C. Lee, J. J. Raftery, Jr., N. Yokouchi, and K. D. Choquette, “Coherently coupled photonic crystal VCSELs,” LEOS 16th Annual Meeting, WL3, Tucson, AZ, USA, 2003.
  23. A. J. Danner, N. Yokouchi, J. J. Raftery, Jr., and K. D. Choquette, “Focused ion beam post-processing for single mode photonic crystal vertical cavity surface-emitting lasers,” Device Research Conference, V.B-6, Salt Lake City, UT, USA, 2003.
  24. A. J. Danner, J. J. Raftery, Jr., U. Krishnamachari, J.C. Lee, N. Yokouchi, and K. D. Choquette, “Scaling of small-aperture photonic crystal vertical cavity lasers,” CLEO Postdeadline session (Conference on Lasers and Electro-Optics), CThPDC9, Baltimore, MD, USA 2003.
  25. A. J. Danner, N. Yokouchi, and K. D. Choquette, “Single mode photonic crystal vertical cavity lasers incorporating etch depth dependence,” CLEO (Conference on Lasers and Electro-Optics), CThP3, Baltimore, MD, USA 2003.
  26. N. Yokouchi, A. J. Danner, and K. D. Choquette, “Lateral mode control of vertical-cavity surface-emitting lasers using two-dimensional photonic crystal structure,” Photonics West, 4994-32, San Jose, CA, USA, Jan. 2003.
  27. N. Yokouchi, A. Danner, and K. D. Choquette, "Vertical cavity surface emitting lasers laterally confined by 2-dimensional photonic crystals," IEEE/LEOS Summer Topical Meetings, TuP2, Mont Tremblant, Quebec, Canada, 2002.
  28. K. D. Choquette and A. J. Danner, “Vertical cavity photonic integrated circuits,” International Semiconductor Device Research Symposium (ISDRS), Washington, D.C., USA, 2001.