Cooperative Recombination of a Quantized High-Density Electron-Hole Plasma

Abstract

We investigate photoluminescence from a high-density electron-hole plasma in semiconductor quantum wells created via intense femtosecond excitation in a strong perpendicular magnetic field, a fully-quantized and tunable system. At a critical magnetic field strength and excitation fluence, we observe a clear transition in the band-edge photoluminescence from omnidirectional output to a randomly directed but highly collimated beam. In addition, changes in the linewidth, carrier density, and magnetic field scaling of the PL spectral features correlate precisely with the onset of random directionality, indicative of cooperative recombination from a high density population of free carriers in a semiconductor environment.

References in corpus (2)

• Bose-Einstein Condensation of Excitons in Bilayer Electron Systems
• Dark-bright magneto-exciton mixing induced by Coulomb interaction in strained quantum wells

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• A table-top, repetitive pulsed magnet for nonlinear and ultrafast spectroscopy in high magnetic fields up to 30 T
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• Renormalized Energies of Superfluorescent Bursts from an Electron-Hole Magneto-plasma with High Gain in InGaAs Quantum Wells
• Generation of Superfluorescent Bursts from a Fully Tunable Semiconductor Magneto-plasma
• Transient dual-energy lasing in a semiconductor microcavity