Continuous two-photon source using a single quantum dot in a photonic crystal cavity

TL;DR

This paper proposes a method to realize a continuous two-photon source using a coherently pumped quantum dot in a photonic crystal cavity, analyzing population dynamics, squeezing effects, and phonon interactions.

Contribution

It introduces a novel scheme for continuous two-photon generation with analysis of population inversion and squeezing, including phonon effects and four-wave mixing techniques.

Findings

Population inversion conditions identified for coherent and incoherent pumping.

Squeezing in the output is not observed with current methods.

Phonon coupling effects are analyzed using a polaron transformed master equation.

Abstract

We propose methods for realization of continuous two photon source using coherently pumped quantum dot embedded inside a photonic crystal cavity. We analyze steady state population in quantum dot energy levels and field inside the cavity mode. We find conditions for population inversion in coherently pumped and incoherently pumped quantum dot. We show that squeezing in the output for two two photon laser is not visible using coherent as well as incoherent pump. We discuss effect of phonon coupling using recently developed polaron transformed master equation at low temperatures. We also propose scheme for generating squeezed state of field using four wave mixing.