標題: Effects of polarization on electroreflectance spectroscopy of surface-intrinsic n(+)-type doped GaAs
作者: Sung, YG
Chiou, SJ
Wang, DP
Lu, YT
Huang, KF
Huang, TC
交大名義發表
National Chiao Tung University
公開日期: 1-Jan-2002
摘要: The electroreflectance (ER) spectra of a surface-intrinsic n(+)-type doped (100) GaAs have been measured at various polarization angles of the probe beam. Several Franz-Keldysh oscillations were observed above the band-gap energy, thus enabling heavy- and light-hole transitions to be separated by the application of the fast Fourier transform to the ER spectra. From this, the ratios of the amplitudes of the light- to heavy-hole transitions versus angle of polarization were obtained. At a large incident angle (80 degrees), the strength of the field of the probe beam in the normal direction of the sample (F(z)) was varied from zero to a larger component. It was found that the ratios increased with increasing F(z) which is consistent with the theory that the light-hole transition becomes more enhanced with z-polarized light. (C) 2002 American Institute of Physics.
URI: http://dx.doi.org/10.1063/1.1420763
http://hdl.handle.net/11536/29074
ISSN: 0021-8979
DOI: 10.1063/1.1420763
期刊: JOURNAL OF APPLIED PHYSICS
Volume: 91
Issue: 1
起始頁: 78
結束頁: 80
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