Semiconductor Microstructure in a Squeezed Vacuum: Electron-Hole Plasma Luminescence

TL;DR

This paper explores how a semiconductor quantum well in a waveguide microcavity interacts with broadband squeezed vacuum radiation, leading to unique luminescence spectra influenced by quantum fluctuations and the particle-hole continuum.

Contribution

It introduces a novel analysis of squeezed vacuum effects on semiconductor microstructure luminescence, highlighting non-Lorentzian spectral features and differences from atomic systems.

Findings

Power spectrum peaks around the squeezed frequency $\\om_0$

Spectral shape is non-Lorentzian due to squeezing and particle-hole effects

Potential observability despite non-radiative dephasing mechanisms

Abstract

We consider a semiconductor quantum-well placed in a wave guide microcavity and interacting with the broadband squeezed vacuum radiation, which fills one mode of the wave guide with a large average occupation. The wave guide modifies the optical density of states so that the quantum well interacts mostly with the squeezed vacuum. The vacuum is squeezed around the externally controlled central frequency $\om_0$, which is tuned above the electron-hole gap $E_g$, and induces fluctuations in the interband polarization of the quantum-well. The power spectrum of scattered light exhibits a peak around $\om_0$, which is moreover non-Lorentzian and is a result of both the squeezing and the particle-hole continuum. The squeezing spectrum is qualitatively different from the atomic case. We discuss the possibility to observe the above phenomena in the presence of additional non-radiative (e-e, phonon) dephasing.