Dresden 2017 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 64: Poster: Photovoltaics and Optics

HL 64.45: Poster

Mittwoch, 22. März 2017, 15:00–19:00, P1C

Emitter and absorber assembly for multiple self-dual operation and directional transparency — •Christian V. Morfonios¹, Panayotis A. Kalozoumis², Georgios Kodaxis², Fotios K. Diakonos², and Peter Schmelcher^1,3 — ¹Zentrum für Optische Quantentechnologien, Universität Hamburg, 22761 Hamburg, Germany — ²Department of Physics, University of Athens, 15771 Athens, Greece — ³Centre for Ultrafast Imaging, Universität Hamburg, 22761 Hamburg, Germany

We propose 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. 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.