Enhanced Directional Quantum Emission by Tunable Topological Doubly-Resonant Cavities

TL;DR

This paper demonstrates how tunable topological doubly-resonant microcavities can significantly enhance quantum emitter emission, enabling faster, more efficient, and unidirectional quantum light sources for advanced optical applications.

Contribution

It introduces a novel tunable doubly-resonant topological microcavity design that enhances quantum emission at arbitrary wavelengths, combining theoretical and experimental validation.

Findings

Enhanced pump excitation and emission efficiencies

Faster emission rates observed

Unidirectional quantum emission achieved

Abstract

How to utilize topological microcavities to control quantum emission is one of the ongoing research topics in the optical community. In this work, we investigate the emission of quantum emitters in doubly-resonant topological Tamm microcavity, which can simultaneously achieve dual resonances at two arbitrary wavelengths according to the needs of practical application. To achieve the enhancement of quantum emission in such cavities, we have exploited the tunable doubly-resonant modes, in which one of resonant modes corresponds to the pump laser wavelength and the other one is located at the emission wavelength of quantum emitters. Both theoretical and experimental results demonstrate that the pump excitation and emission efficiencies of quantum emitters are greatly enhanced. The main physical mechanism can be explained by the doubly-resonant cavity temporal coupled-mode theory. Furthermore, we observe the faster emission rate and the higher efficiency of unidirectional quantum emission, which have promising applications in optical detection, sensing, filtering, and light-emitting devices.