Renormalized Energies of Superfluorescent Bursts from an Electron-Hole Magneto-plasma with High Gain in InGaAs Quantum Wells

Abstract

We study light emission properties of a population-inverted 2D electron-hole plasma in a quantizing magnetic field. We observe a series of superfluorescent bursts, discrete both in time and energy, corresponding to the cooperative recombination of electron-hole pairs from different Landau levels. The emission energies are strongly renormalized due to many-body interactions among the photogenerated carriers, exhibiting red-shifts as large as 20 meV at 15 T. However, the magnetic field dependence of the lowest Landau level emission line remains excitonic at all magnetic fields. Interestingly, our time-resolved measurements show that this lowest-energy burst occurs only after all upper states become empty, suggesting that this excitonic stability is related to the `hidden symmetry' of 2D magneto-excitons expected in the magnetic quantum limit.

5 pages, 4 figures

References in corpus (2)

• Giant Superfluorescent Bursts from a Semiconductor Magnetoplasma
• Cooperative Recombination of a Quantized High-Density Electron-Hole Plasma

Cited by in corpus (6)

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• Giant Superfluorescent Bursts from a Semiconductor Magnetoplasma
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• Magneto-optical Spectroscopy with RAMBO: A Table-Top 30 T Magnet
• Observation of Photoinduced Terahertz Gain in GaAs Quantum Wells: Evidence for Radiative Two-Exciton-to-Biexciton Scattering