High Purcell enhancement in all-TMDC nanobeam resonator designs with active monolayers for nanolasers

TL;DR

This paper introduces a fully TMDC-based nanobeam resonator with active monolayers, achieving high Purcell enhancement and potential for efficient nanolasers through theoretical modeling and numerical optimization.

Contribution

It presents a novel all-TMDC nanobeam design with a theoretical framework for optimizing Purcell enhancement in atomically thin layers.

Findings

High-Q resonance with strong electric field confinement

Enhanced Purcell factor in the designed resonator

Potential for high-efficiency nanolasers

Abstract

We propose a nanobeam resonator incorporating an active monolayer, designed to achieve a high Purcell enhancement. The resonator is fully composed of transition-metal-dichalcogenide materials and intended to operate as a high-beta-factor nanolaser. A theoretical framework that models and optimizes the Purcell enhancement associated with the emission from atomically thin layers is developed. This framework is based on a resonance expansion, enabling spectral resolution of physical quantities governed by high-Q resonances. The numerical optimization of the resonator leads to the presence of a high-Q resonance supporting a strong electric field confinement in the monolayer to maximize the modal gain.