Microwave limiters implemented by coupled dielectric resonators based on a topological defect mode and CT-symmetry breaking

Abstract

We present a microwave realization of a reflective topological limiter based on an explicit self-induced violation of a charge-conjugation (CT) symmetry. The starting point is a bipartite structure created by coupled dielectric resonators with a topological defect placed at the center and two lossy resonators placed on the neighboring sites of the defect. This defect supports a resonant mode if the CT-symmetry is present, while it is suppressed once the symmetry is violated due to permittivity changes of the defect resonator associated with high irradiances of the incident radiation. This destruction leads to a suppression of transmittance and a subsequent increase of the reflectance while the absorption is also suppressed.

arXiv comment7 pages, 13 figures, 1 table

References in corpus (11)

• Topological Insulators
• Novel Symmetry Classes in Mesoscopic Normal-Superconducting Hybrid Structures
• Selective enhancement of topologically induced interface states in a dielectric resonator chain
• Topologically protected midgap states in complex photonic lattices
• Topologically protected defect states in open photonic systems with non-hermitian charge-conjugation and parity-time symmetry
• Random-matrix theory of Majorana fermions and topological superconductors
• Topological transition of Dirac points in a microwave experiment
• Tight-binding couplings in microwave artificial graphene
• Disordered graphene and boron nitride in a microwave tight-binding analog
• Reflective Optical Limiter Based on Resonant Transmission
• Waveguide photonic limiters based on topologically protected resonant modes