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  • Light-hole quantization in the optical response of ultra-wide GaAs/Al(x)Ga(1-x)As quantum wells.

Light-hole quantization in the optical response of ultra-wide GaAs/Al(x)Ga(1-x)As quantum wells.

Journal of physics. Condensed matter : an Institute of Physics journal (2012-11-28)
V V Solovyev, V A Bunakov, S Schmult, I V Kukushkin
ABSTRACT

Temperature-dependent reflectivity and photoluminescence spectra are studied for undoped ultra-wide 150 and 250 nm GaAs quantum wells. It is shown that spectral features previously attributed to a size quantization of the exciton motion in the z-direction coincide well with energies of quantized levels for light holes. Furthermore, optical spectra reveal very similar properties at temperatures above the exciton dissociation point.

MATERIALS
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Sigma-Aldrich
Gallium arsenide, (single crystal substrate), <100>, diam. × thickness 2 in. × 0.5 mm