標題: | Carrier-carrier scattering in GaAs/AlxGa1-xAs quantum wells |
作者: | Sun, KW Song, TS Sun, CK Wang, JC Kane, MG Wang, SY Lee, CP 電子工程學系及電子研究所 Department of Electronics Engineering and Institute of Electronics |
公開日期: | 15-六月-2000 |
摘要: | We have studied carrier dynamics in highly nonequilibrium two-dimensional (2D) carrier distributions generated with femtosecond laser pulses in p-doped GaAs/Al0.32Ga0.68As quantum wells at photoexcited carrier densities between 10(9) and 10(11) cm(-2). The initially nonthermal carrier distribution is quickly broadened due to inelastic carrier-carrier scattering, with the broadening rate increasing as carrier density is increased. Measurements of the unrelaxed peak height in the hot electron-neutral acceptor luminescence spectra are compared with calculations of the carrier distribution using integration of the 2D dynamically screened Boltzmann equation. Our results indicate that carrier-carrier scattering becomes as significant a scattering mechanism as LO-phonon emission at density of about 10(10) cm(-2). |
URI: | http://dx.doi.org/10.1103/PhysRevB.61.15592 http://hdl.handle.net/11536/30458 |
ISSN: | 1098-0121 |
DOI: | 10.1103/PhysRevB.61.15592 |
期刊: | PHYSICAL REVIEW B |
Volume: | 61 |
Issue: | 23 |
起始頁: | 15592 |
結束頁: | 15595 |
顯示於類別: | 期刊論文 |