Semiconductor microstructure in a squeezed vacuum: Electron-hole plasma luminescence

We consider a semiconductor quantum-well placed in a waveguide microcavity and interacting with the broadband squeezed vacuum radiation, which fills one mode of the waveguide with a large average occupation. The waveguide 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 omega(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 omega(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 of observing the above phenomena in the presence of additional nonradiative (e-e, phonon) dephasing.