Two-photon lasing by a single quantum dot in a high-Q microcavity

TL;DR

This paper theoretically explores two-photon lasing in a high-Q microcavity with a single quantum dot, demonstrating conditions for two-photon emission and analyzing device feasibility.

Contribution

It introduces a theoretical model for two-photon lasing using a single quantum dot in a microcavity, highlighting the resonant two-photon transition mechanism.

Findings

Identification of regimes for two-photon emission

Analysis of steady-state behavior under incoherent pumping

Feasibility assessment for quantum dot-based two-photon lasers

Abstract

We investigate theoretically two-photon processes in a microcavity containing one quantum dot in the strong coupling regime. The cavity mode can be tuned to resonantly drive the two-photon transition between the ground and the biexciton states, while the exciton states are far-off resonance due to the biexciton binding energy. We study the steady state of the quantum dot and cavity field in presence of a continuous incoherent pumping. We identify the regime where the system acts as two-photon emitter and discuss the feasibility and performance of realistic single quantum dot devices for two-photon lasing.