A photomodulated spectroscopy study of InxGa1−xAs/GaAs superlattices and quantum wells

1 June 1991

journal article
Published by AIP Publishing in Journal of Applied Physics

Vol. 69 (11) , 7836-7843
https://doi.org/10.1063/1.347515

Abstract

We present here a detailed study of photomodulated transmission and reflectivity at room and liquid-nitrogen temperatures of a series of InxGa1−xAs/GaAs superlattices and a single quantum well. Our samples span a variety of alloy compositions and quantum-well widths. We compare the results of our measurements with the predictions of an envelope-function calculation, which includes wave-vector dependence of the minibands. This comparison allows identification of several spectral features unmistakably arising from miniband dispersion. Also, accurate determination is made of the band-offset parameter, whose value is discussed in the context of those obtained by other authors.

This publication has 30 references indexed in Scilit:

Electron minibands and Wannier-Stark quantization in an ${In}_{0.15}$ ${Ga}_{0.85}$ As-GaAs strained-layer superlattice
Physical Review B, 1990
Effects of thermal annealing on the confined electronic states of InxGa1−xAs/GaAs strained-layer superlattices
Superlattices and Microstructures, 1989
Exciton linewidth narrowing in thin-barrier GaAs/ ${Al}_{x}$ ${Ga}_{1 - x}$ As superlattices
Physical Review B, 1989
Interband transitions in InxGa1−x As/GaAs strained layer superlattices
Journal of Vacuum Science & Technology B, 1989
Excitons associated with subband dispersion in GaAs/ ${Al}_{x}$ ${Ga}_{1 - x}$ As superlattices
Physical Review B, 1989
Electromodulation spectroscopy of confined systems
Superlattices and Microstructures, 1989
Photoreflectance study of narrow-well strained-layer ${In}_{x}$ ${Ga}_{1 - x}$ As/GaAs coupled multiple-quantum-well structures
Physical Review B, 1988
On the Mechanisms of Photoreflectance in Multiple Quantum Wells
Physica Status Solidi (b), 1988
Temperature dependence of photoreflectance line shapes in GaAsAlGaAs multiple quantum wells
Superlattices and Microstructures, 1987
Superlattice band structure in the envelope-function approximation
Physical Review B, 1981