Broadband and Wide-Angle Nonreciprocity with a Nonhermitian Metamaterial

Abstract

We theoretically demonstrate a non-hermitian metamaterial exhibiting broadband and wide-angle nonreciprocity. The metamaterial consists of planar metal-dielectric layers with a Parity-Time (PT) symmetric distrubtion of loss and gain. With increasing loss and gain, the bandstructure and bandgap are strongly modified; further, the PT potential leads to distinct internal field distributions when illuminated from different sides. Including nonlinearities arising from natural loss and gain saturation leads to nonreciprocal transmission in the visible over a 50 nm wavelength and 60${}^{\circ }$ degree angular range.

7 pages, 4 figures

References in corpus (2)

• Unidirectional Nonlinear PT-symmetric Optical Structures
• The effect of gain saturation in a gain compensated perfect lens

Cited by in corpus (5)

• Fate of the non-Hermitian skin effect in many-body fermionic systems
• PT-symmetry breaking in multilayers with resonant loss and gain locks light propagation direction
• Nonreciprocal Transmission in Nonlinear PT-Symmetric Metamaterials Using Epsilon-near-Zero Media Doped with Defects
• Active Polarization Control with a Parity-Time Symmetric Plasmonic Resonator
• Static synthetic gauge field control of double optomechanically induced transparency in a closed-contour interaction scheme