Effect of nonparabolicity of the electron and light-hole energy spectrum on the optical properties of heterostructures with deep AlSb/InAs{sub 0.86}Sb{sub 0.14}/AlSb quantum wells

Journal Article · Fri May 15 04:00:00 EDT 2015 · Semiconductors

DOI:https://doi.org/10.1134/S106378261505019X· OSTI ID:22469965

The optical characteristics of heterostructures with deep quantum wells are studied using the AlSb/InAs{sub 0.86}Sb{sub 0.14}/AlSb structure within the framework of the four-band Kane model with regard to the nonparabolicity of the carrier energy spectrum. It is demonstrated that consideration of the nonparabolicity increases the number of size-quantization levels in the conduction band. At a quantum-well width of 100 Å, the investigated heterostructure contains three size-quantization levels within the parabolic model and six levels within the Kane model. This is due to the fact that the effective mass of high-energy electrons is found to be larger than the mass of electrons at the bottom of the conduction band by a factor of four. It is shown that account for the nonparabolicity only slightly affects the overlap integral for the s and p states, but significantly increases the density of states in the conduction band, which causes considerable growth in the radiation-absorption coefficient.

• OSTI ID: 22469965
• Journal Information: Semiconductors, Journal Name: Semiconductors Journal Issue: 5 Vol. 49; ISSN SMICES; ISSN 1063-7826
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
77 NANOSCIENCE AND NANOTECHNOLOGY
ABSORPTION
ALUMINIUM COMPOUNDS
DENSITY OF STATES
EFFECTIVE MASS
ELECTRONS
ENERGY SPECTRA
HETEROJUNCTIONS
HOLES
INDIUM ANTIMONIDES
INDIUM ARSENIDES
OPTICAL PROPERTIES
P STATES
QUANTIZATION
QUANTUM WELLS
VISIBLE RADIATION