CUED Publications database

Properties of electrons and holes during femtosecond cooperative emission

Vasil'ev, PP and Kan, H and Ohta, H and Hiruma, T (2001) Properties of electrons and holes during femtosecond cooperative emission. Quantum Electronics, 31. pp. 870-876. ISSN 1063-7818

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Abstract

Spectral and energetic characteristics of the cooperative recombination of high density electrons and holes in bulk GaAs are experimentally studied at room temperature. It is shown that the properties and parameters of femtosecond superradiant pulses are conditioned by the collective properties of electrons and holes. Electron-hole pairing and the formation of a short-living coherent e-h BCS state distinguish strongly the regime of cooperative emission from all radiative e-h recombination regimes, which have been observed earlier. The dependences of the energy gap (the order parameter), the Fermi energy, and the band gap of the coherent e-h BCS state on the concentration of electron-hole pairs are obtained.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div B > Photonics
Depositing User: Cron job
Date Deposited: 16 Jul 2015 13:05
Last Modified: 31 Aug 2015 04:07
DOI: 10.1070/QE2001v031n10ABEH002067