TOPIC Perspectives on Bianisotropic Metamaterials: Searching for Physics-based Classification 
AREA Microwave & RF 
SPEAKER Dr Ari Sihvola, Aalto University, Finland 
DATE 6 March 2015, Friday 
TIME 10:00 am to 11:30 am 
VENUE E5-02-32, Engineering Blk E5, Faculty of Engineering, NUS 
FEES No Charge 

Metamaterials are media with a complicated and unintuitive response. In particular in the electromagnetics framework, modeling of metamaterials has been given particular attention during the last 15 years. Of course, analyzing the response of complex materials has a history that reaches much further back into the history. The complex response of media may have its origin in many physical phenomena: anisotropy, chirality, non-reciprocity, magneto-electric coupling, non-linearity, non-locality, dispersion, etc. Also, the response may look different depending on the formalism used in the analysis. For example, the Gibbsian dyadic description and the four-dimensional field picture use different language: properties carry names like permittivity, permeability, axion, or skewon which are not directly translatable from one description to the other. In this talk, I will focus on the ways how a multidimensional (linear) bianisotropic character of complex materials can be seen in a structured framework. In particular, I will discuss a new way to classify the space of bi-isotropic materials (such with response not depending on the vector direction of the exciting fields) that is connected to PEMC medium (this concept was first presented in I.V. Lindell, A.H. Sihvola: Perfect electromagnetic conductor, Journal of Electromagnetic Waves and Applications, Vol. 19, No. 7, pp. 861-869, 2005). 

Ari Sihvola was born in 1957, in Valkeala (Finland). He received the degrees of Diploma Engineer in 1981, Licentiate of Technology in 1984, and Doctor of Technology in 1987, all in Electrical Engineering, from the Helsinki University of Technology (TKK), Finland. Besides working for TKK and the Academy of Finland, he was visiting engineer in the Research Laboratory of Electronics of the Massachusetts Institute of Technology, Cambridge, in 1985–1986, and in 1990–1991, he worked as a visiting scientist at the Pennsylvania State University, State College. In 1996, he was visiting scientist at the Lund University, Sweden, and for the academic year 2000–2001 he was visiting professor at the Electromagnetics and Acoustics Laboratory of the Swiss Federal Institute of Technology, Lausanne. In the Summer of 2008, he was visiting professor at the University of Paris XI, France. Ari Sihvola is professor of electromagnetics in Aalto University School of Electrical Engineering (Aalto University was created in 2010 as a merger of three universities: Helsinki University of Technology, Helsinki School of Economics, and the University of Art and Design). His scientific interests range from electromagnetic theory, complex media, materials modeling, remote sensing, and radar applications, into engineering education research and history engineering and technology. Ari Sihvola is Chairman of the Finnish National Committee of URSI (International Union of Radio Science), Vice Chairman of the Commission B (Fields and Waves) of the international URSI, and Fellow of IEEE. In 1990’s, he has served as Chairman of the IEEE AP–MTT Chapter for several years. He was awarded the five-year Finnish Academy Professor position in 2005–2010. He is also director of the Finnish Graduate School of Electronics, Telecommunications, and Automation (GETA). Author of several books and hundreds of publications, Ari has been active in organizing conferences and workshops, convening and chairing sessions, and serving in advisory, technical, and organizing committees for numerous national and international scientific symposia as member, secretary, or chairman. In TKK and Aalto University, Ari Sihvola has received several teaching awards, like the “Teacher of the Year” Prize in 1995 from the Student Union of TKK. 

Jointly organized by IEEE Singapore MTT/AP Chapter and Department of Electrical & Computer Engineering, NUS 

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