P·T·D and rotational symmetries of electromagnetic and photonic systems have recently been shown, separately, to characterize different nonreflecting structures. In particular, rotational symmetries have been presented as “self-dual” systems with rotations of 90 deg. In this seminar, I will endeavor to show a new general framework for both types of symmetries, casting the rotational symmetry in terms of a new P·T·D type symmetry. Out of this analysis, a third option emerges; namely, a combined P·T·D/R·T·D symmetry condition, which is more general, allowing for arbitrary angles of rotation. With this option, the door opens for synthesis of many new non-reflecting media, as will be demonstrated by some examples.
About the Speaker:
Raphael Kastner (Life Fellow, IEEE) was born in Haifa, Israel, in 1948. He received the B.Sc. (summa cum laude) and M.Sc. degrees in EE from the Technion, Israel Institute of Technology, Haifa, in 1973 and 1976, respectively, and the Ph.D. degree from the University of Illinois, in 1982. From 1976 to 1988, he was with RAFAEL, Israel Armament Development Authority, where he headed the Antenna Section from 1982 to 1986. He was a Visiting Assistant Professor with Syracuse University from 1986 to 1987 and a Visiting Scholar with the University of Illinois in 1987 and Since 1988, he has been with the School of EE, Tel Aviv University, Tel Aviv, Israel, where he is currently a Professor Emeritus. In 2000, he cofounded XellAnt Inc. and acted as its CEO until 2004. Between 2016 and 2020 he was a Visiting Scholar with the University of Pennsylvania, Philadelphia, PA, USA. His research interests are in computational electromagnetics and artificial materials in electromagnetics. Prof. Kastner is a member of Tau Beta Pi and Eta Kappa Nu andis a recipient of the IEEE Third Millennium Medal and several excellences in teaching awards.
Affiliation: Tel Aviv University
Contact Person: Prof. Giacomo OLIVERI <giacomo.oliveri@unitn.it>