Andrea Alu, alu@mail.utexas.edu
Co-authors: Dimitrios Sounas, Romain Fleury
Parity-time symmetric metasurfaces and metamaterials
Metamaterials are artificially structured materials possessing exotic electromagnetic or acoustic properties that
are not readily available in nature, for instance synthesizing negative, zero, or very large index of refraction.
Their exotic features are typically associated with narrow bandwidths and losses. In this talk, we introduce the
concept and theoretical modeling of parity-time (PT) symmetric metasurface pairs and metamaterials, which
offer a unique solution to these issues, realizing loss-compensated, broadband wave manipulation, including
negative refraction, cloaking and planar focusing. We discuss the largely uncharted scattering properties of
PT-symmetric metamaterials and metasurfaces, with an emphasis on the exciting mathematical and physical
aspects involved in these problems.