Study of the band offset in InxGa1-xAs/GaAs system using photoreflectance of single quantum wells

Alexander Ksendzov; Hongen Shen; Fred H. Pollak; David P. Bour

doi:10.1117/12.20751

1 October 1990 Study of the band offset in In_xGa_1-xAs/GaAs system using photoreflectance of single quantum wells

Alexander Ksendzov, Hongen Shen, Fred H. Pollak, David P. Bour

Proceedings Volume 1283, Quantum Well and Superlattice Physics III; (1990) https://doi.org/10.1117/12.20751
Event: Advances in Semiconductors and Superconductors: Physics Toward Devices Applications, 1990, San Diego, CA, United States

Abstract

In order to gain information about the band offset in the strained layer InGa1As/GaAs system we have investigated photorefleCtanCe (PR) from two single quantum wel 1 samples at 300 K and 77 K. Our samples have we 1 1 width L= 110 A (sample 1) and L = 107 A (sample 2) with In Composition x = 0. 11 (sample 1 ) and x = 0. 19 (sample 2 ) . We have observed a number of intersubband transitions in the spectra of both samples. By studying the polarization dependence of the PR at 300 K using an internal reflection mode we have identified spectral features Corresponding to light and heavy hole to conduction subband transitions. Good agreement between our experimental results and an envelope function calculation (including strain) is obtained for conduction band offset Q = 0.45 0.07 (sample 1) and Q = 0.67 0.07 (sample 2). These values comply with the compositional dependence of proposed by Joyce et al [Phys.Rev. B 38, 10978 (1988)1.

Citation Download Citation

Alexander Ksendzov, Hongen Shen, Fred H. Pollak, and David P. Bour "Study of the band offset in In_xGa_1-xAs/GaAs system using photoreflectance of single quantum wells", Proc. SPIE 1283, Quantum Well and Superlattice Physics III, (1 October 1990); https://doi.org/10.1117/12.20751

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