Non-Hermitian transformations with optical metasurfaces

Abstract

We present theoretical and experimental results demonstrating non-Hermitian transformation of classical and quantum states of light with ultra-thin dielectric metasurfaces. We introduce a new conceptual approach for implementing arbitrary complex birefringence with polarization-dependent transmission, based on tailored interference from specially engineered nano-resonators in the metasurface. The fabricated metasurfaces demonstrate new regimes of polarisation control for enhanced measurements and unconventional interference with classical and quantum light, and discuss analogies with Parity-Time symmetric transformations. Show more