Spectral characteristics of coupled gratings at PT-symmetry and its destruction

E. A. Efremova; I. R. Krylov; U. V. Prokhorova; E. V. Shalymov; V. I. Shoev; V. Yu. Venediktov; A. A. Zinchik

doi:10.1117/12.2643054

19 December 2022 Spectral characteristics of coupled gratings at PT-symmetry and its destruction

E. A. Efremova, I. R. Krylov, U. V. Prokhorova, E. V. Shalymov, V. I. Shoev, V. Yu. Venediktov, A. A. Zinchik

Proceedings Volume 12321, Advanced Sensor Systems and Applications XII; 123210O (2022) https://doi.org/10.1117/12.2643054
Event: SPIE/COS Photonics Asia, 2022, Online Only

Abstract

The article describes an optical response of metastructure consisted of two optically coupled resonant subwavelength rectangular - profile diffraction gratings, between which a layer of optically transparent dielectric was placed. The features of optical resonance transmittance and reflectance for optical PT-symmetry mode was numerical investigated and some advantages of using optical PT-symmetry for resonance transmittance (reflectance) improving was demonstrated. The spectral characteristics of the metastructure change when the pumping level changes and when the system switches from the optical parity-time-symmetry mode to the broken parity-time-symmetry mode were analyzed too.

Conference Presentation

Citation Download Citation

E. A. Efremova, I. R. Krylov, U. V. Prokhorova, E. V. Shalymov, V. I. Shoev, V. Yu. Venediktov, and A. A. Zinchik "Spectral characteristics of coupled gratings at PT-symmetry and its destruction", Proc. SPIE 12321, Advanced Sensor Systems and Applications XII, 123210O (19 December 2022); https://doi.org/10.1117/12.2643054

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