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Broadening of Absorption Spectrum in a P-type InGaAs-InAlAs Coupled Quantum Well

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Authors
Kim, Kyung Hwan; Kim, Sung June
Issue Date
1997-12
Publisher
Institute of Physics
Citation
Semicond. Sci. Technol. 12 1579
Abstract
The intervalence subband absorption of normally incident infrared
radiation in a p-type InGaAs–InAlAs coupled quantum well (CQW) is theoretically
investigated by the multiband effective mass formalism. We calculate valence
subband structures, intervalence subband transition matrix elements and the
absorption coefficient spectrum in the CQW which consists of a wider well, a
thinner well and a barrier between. We demonstrate that the absorption coefficient
profile can be tailored to suit one’s need by careful control of the flexible design
parameters given to the valence band CQW structure. For the application to an
infrared detector with a flat absorptivity over a wider wavelength range than the
conventional detectors, the CQW is designed to have broadened absorption
spectrum
ISSN
0268-1242
Language
English
URI
http://hdl.handle.net/10371/8977
DOI
https://doi.org/10.1088/0268-1242/12/12/006
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Electrical and Computer Engineering (전기·정보공학부)Journal Papers (저널논문_전기·정보공학부)
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