Jho YD, Wang X, Kono J, Reitze DH, Wei X, Belyanin AA, Kocharovsky VV, Kocharovsky VV, Solomon GS. Cooperative recombination of a quantized high-density electron-hole plasma in semiconductor quantum wells.
PHYSICAL REVIEW LETTERS 2006;
96:237401. [PMID:
16803400 DOI:
10.1103/physrevlett.96.237401]
[Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2005] [Indexed: 05/10/2023]
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 photoluminescence 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.
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