Applied Physics Seminar

Controlling Light with Meta-Symmetries and Couplings

Boubacar Kante, Nanoscale Science and Engineering Center, University of California Berkeley,

Speaker's Bio:
Boubacar Kante is a postdoctoral fellow at the Nanoscale Science and Engineering Center at University of California Berkeley. He received an advanced graduate degree in Electrical Engineering and Computer Science from Ecole Polytechnique Universitaire de Lille (France) together with the M. Sc. degree in Telecommunications in 2006. In 2009, he received a Ph.D degree in Physics from the Université de Paris Sud (Orsay-France). His research interests include wave meta-matter interaction, and nano-optics, as well as related fields such as optical metamaterials, plasmonics, nanoscale-photon management and bio-physics.

In this talk, I will discuss the fundamental role of symmetries at the nanoscale level in constructing optical metamaterials and plasmonic systems. I will propose the first strategy for the - long awaited isotropic negative index at optical frequencies by proposing a classification of ring-resonators with striking similarities with the Kramer degeneracy of odd electrons. I will demonstrate that, by using symmetry breaking, and, by introducing the notion of negative coupling, it is possible to achieve ultra broadband negative index (1.3-2.3μm) with closed rings, the equivalent of the Bohr model of atoms (so far deemed impossible). I will also show a route for full cloaking at optical frequencies as well as an original effective index approach to meta-films (meta-surfaces) that could be used in photon management for energy applications.

Event Sponsors:

Applied Physics - More events from this Sponsor

For more information, please contact Christy Jenstad by phone at 8124 or by email at [email protected].