Emitter and absorber assembly for multiple self-dual operation and directional transparency
arXiv:1609.04211 · doi:10.1063/1.4978931
Abstract
A recursive scheme for the design of scatterers acting simultaneously as emitters and absorbers, such as lasers and coherent perfect absorbers in optics, at multiple prescribed frequencies is proposed. The approach is based on the assembly of non-Hermitian emitter and absorber units into self-dual emitter-absorber trimers at different composition levels, exploiting the simple structure of the corresponding transfer matrices. In particular, lifting the restriction to parity-time-symmetric setups enables the realization of emitter and absorber action at distinct frequencies and provides flexibility in the choice of realistic parameters. We further show how the same assembled scatterers can be rearranged to produce unidirectional and bidirectional transparency at the selected frequencies. With the design procedure being generically applicable to wave scattering in single-channel settings, we demonstrate it with concrete examples of photonic multilayer setups.
5 pages, 2 figures
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- Broadband and Wide-Angle Invisibility with PT-Symmetric 2D-Weyl Semimetal
- Born-Padé approach to electromagnetic scattering in complex one-dimensional inhomogeneous slabs
- Polar magneto-optic Kerr and Faraday effects in finite periodic \texorpdfstring{}{PT}-symmetric systems