One – dimensional topological nanostructures utilizing surface Phonon Polaritons on Silicon Carbide

Date

2022-08

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Abstract

Polaritonic devices show a wide range of applications from controllable absorption/emission of mid-far infrared light to chemical and biosensing. The recent development of topological photonics allows for symmetry-protected propagation of polaritonic modes as well as the generation of zero energy edge states along domain walls and at system boundaries. Here, the Su-Schrieffer-Heeger model is used to describe interaction between metal-dielectric-polar dielectric coupled waveguides in a dimerized, 1-dimensional chain, and non-Hermitian methods are considered to produce exceptional points in the band structure with the goal of generating isolated edge states, controlling the gain-loss structure of our device, and eventually creating unidirectional mode transport in two- and three-dimensional systems. Computational analysis of metasurface parameters, such as cavity coupling strength and mode propagation distance, provides predictions for near-field solutions in and around the nanocavities and can be used to tune field parameters toward robust edge mode creation. We provide an experimental study of state detection within systems of passive and active polaritonic nanostructures and discuss the development of a non-Hermitian, topological photonic system.

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Keywords

Topology, Non-Hermitian, Metasurface, Phonons, Plasmons, Polaritons, Su-Schrieffer-Heeger

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