Excitonic recombination of degenerate two-dimensional electrons with localized photoexcited holes in a single heterojunction quantum well

Patrick A. Folkes; Mitra B. Dutta; Sergey Rudin; Hongen Shen; Monica Alba Taysing-Lara; Doran D. Smith; Peter G. Newman; Melanie W. Cole

doi:10.1117/12.137601

3 September 1992 Excitonic recombination of degenerate two-dimensional electrons with localized photoexcited holes in a single heterojunction quantum well

Patrick A. Folkes, Mitra B. Dutta, Sergey Rudin, Hongen Shen, Monica Alba Taysing-Lara, Doran D. Smith, Peter G. Newman, Melanie W. Cole

Author Affiliations +

Proceedings Volume 1675, Quantum Well and Superlattice Physics IV; (1992) https://doi.org/10.1117/12.137601
Event: Semiconductors '92, 1992, Somerset, NJ, United States

Abstract

We report the observation of the excitonic recombination of degenerate quasi-two-dimensional electrons with localized photoexcited holes. Low-temperature photoluminescence spectra exhibit a sharp Fermi surface and a well resolved 'Mahan' exciton resonance which is sensitive to electron density n_s and temperature. We observe a sharp decrease in the exciton linewidth with a concomitant double peak spectrum which is attributed to the formation of biexcitons and a large discontinuity in the exciton groundstate energy at n_s approximately equals 1.9 X 10¹¹ cm^-2. An abrupt transition from excitonic to free electron-hole recombination occurs at n_s approximately equals 2.2 X 10¹¹ cm^-2.

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Patrick A. Folkes, Mitra B. Dutta, Sergey Rudin, Hongen Shen, Monica Alba Taysing-Lara, Doran D. Smith, Peter G. Newman, and Melanie W. Cole "Excitonic recombination of degenerate two-dimensional electrons with localized photoexcited holes in a single heterojunction quantum well", Proc. SPIE 1675, Quantum Well and Superlattice Physics IV, (3 September 1992); https://doi.org/10.1117/12.137601

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