MoS2-based optical bistability in silver-Bragg reflector multilayer structure at visible light band

TL;DR

This paper theoretically investigates optical bistability in a silver-Bragg reflector structure with embedded bilayer MoS2, demonstrating tunable hysteresis behavior influenced by wavelength, position, and structural parameters, aiming for low-threshold applications.

Contribution

It introduces a novel theoretical analysis of optical bistability in a MoS2-integrated silver-Bragg structure, highlighting tunability and potential for low-threshold bistability in visible light.

Findings

Hysteresis behavior can be tuned by incident wavelength.

Optical bistability is adjustable via MoS2 position and structural parameters.

Current thresholds are not yet suitable for commercialization.

Abstract

In this paper, we present a theoretical analysis of the optical bistability in a metallic silver-Bragg reflector structure by embedding bilayer MoS2 at the visible band. The nonlinear OB is achieved due to the nonlinear conductivity of the bilayer MoS2 and the excitation of the optical Tamm state at the interface between the silver and the Bragg reflector. It is found that the hysteresis behaviour and the threshold width of the OB can be effectively tuned by varying the incident light wavelength. In addition, the optical bistable behaviour of the structure can be adjusted by varying the position of the MoS2 inset in the defect layer, incident angle and the structural parameters of the spacer layer. Although the current threshold cannot be commercialized, we believe that this solution will provide a meaningful path reference for low threshold bistability in the visible light band.