Super band‐gap time‐resolved luminescence study of degenerate electron–hole plasma in thin GaAs epilayers

Autor:	Boris D. Fainberg, Yossi Rosenwaks, E. Poles, S.Y. Goldberg, M. C. Hanna, Dan Huppert
Rok vydání:	1996
Předmět:	Materials science Photoluminescence business.industry Band gap General Physics and Astronomy Electron hole Plasma Molecular physics Spectral line Condensed Matter::Materials Science Wavelength Optoelectronics business Electronic band structure Luminescence
Zdroj:	Journal of Applied Physics. 80:5129-5137
ISSN:	1089-7550 0021-8979
DOI:	10.1063/1.363494
Popis:	Super band‐gap time‐resolved photoluminescence is employed to measure the transport properties of degenerate electron–hole gas in thin GaAs epilayers. It is found that the luminescence decay at wavelengths shorter then the energy gap wavelength is much faster then expected from a simple diffusion–reabsorption model. The results are explained by using a transport model based on Fermi–Dirac carrier statistics and nonparabolic band structure. We have found that only by introducing the above two phenomena the photoluminescence spectra at all energies can be fitted. The importance of the results in studies of hot carrier energy loss rates is discussed.
Databáze:	OpenAIRE
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