Normal-incidence intersubband hole absorption in In0.5Ga0.5As/Al0.45Ga0.55As quantum wells

Bartev J. Vartanian; James S. Harris Jr.

doi:10.1117/12.175725

11 May 1994 Normal-incidence intersubband hole absorption in In_0.5Ga_0.5As/Al_0.45Ga_0.55As quantum wells

Bartev J. Vartanian, James S. Harris Jr.

Author Affiliations +

Proceedings Volume 2139, Quantum Well and Superlattice Physics V; (1994) https://doi.org/10.1117/12.175725
Event: OE/LASE '94, 1994, Los Angeles, CA, United States

Abstract

Normal incidence absorption between valence band states is demonstrated in high indium content InGaAs/AlGaAs quantum wells (QWs) grown on GaAs. We report absorption at energies up to 300 meV (4.13 micrometers ) and integrated absorption fractions as high as 56 mAbs-meV per QW. The dependence of the absorption strength and peak energy on well width, barrier width, doping concentration, and doping profile is explored. It is found that a stronger absorption is obtained with the same sheet doping density for structures where the doping is in the barriers. We also discuss the differences observed between transverse magnetic and transverse electric incident polarizations in the absorption spectra.

Citation Download Citation

Bartev J. Vartanian and James S. Harris Jr. "Normal-incidence intersubband hole absorption in In_0.5Ga_0.5As/Al_0.45Ga_0.55As quantum wells", Proc. SPIE 2139, Quantum Well and Superlattice Physics V, (11 May 1994); https://doi.org/10.1117/12.175725

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