Long-wavelength stimulated emission and carrier lifetimes in HgCdTe-based waveguide structures with quantum wells

The interband photoconductivity and photoluminescence in narrow-gap HgCdTe-based waveguide structures with quantum wells (QWs) (designed for long-wavelength stimulated emission under optical pumping) are investigated. The photoconductivity relaxation times in n -type structures reach several microse...

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Bibliographic Details
Published in:Semiconductors (Woodbury, N.Y.) N.Y.), 2016-12, Vol.50 (12), p.1651-1656
Main Authors: Rumyantsev, V. V., Fadeev, M. A., Morozov, S. V., Dubinov, A. A., Kudryavtsev, K. E., Kadykov, A. M., Tuzov, I. V., Dvoretskii, S. A., Mikhailov, N. N., Gavrilenko, V. I., Teppe, F.
Format: Article
Language:English
Subjects:
2016
ANNEALING
Cadmium compounds
CADMIUM TELLURIDES
CARRIER LIFETIME
CHARGE CARRIERS
CONCENTRATION RATIO
Emission analysis
Lasers
Magnetic Materials
Magnetism
March 14–18
MATERIALS SCIENCE
MERCURY
Mercury cadmium tellurides
MERCURY COMPOUNDS
Nizhny Novgorod
OPTICAL PUMPING
P-TYPE CONDUCTORS
PHOTOCONDUCTIVITY
PHOTOLUMINESCENCE
Physics
Physics and Astronomy
QUANTUM WELLS
Radiation (Physics)
RECOMBINATION
RELAXATION
Spontaneous emission
STIMULATED EMISSION
VACANCIES
Waveguides
WAVELENGTHS
XX International Symposium “Nanophysics and Nanoelectronics”
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Summary:The interband photoconductivity and photoluminescence in narrow-gap HgCdTe-based waveguide structures with quantum wells (QWs) (designed for long-wavelength stimulated emission under optical pumping) are investigated. The photoconductivity relaxation times in n -type structures reach several microseconds, due to which stimulated emission at a wavelength of 10.2 μm occurs at a low threshold pump intensity (~100 W/cm 2 ) at 20 K. In the p -type structures obtained by annealing (to increase the mercury vacancy concentration), even spontaneous emission from the QWs is not detected because of a dramatic decrease in the carrier lifetime with respect to Shockley–Read–Hall nonradiative recombination.
ISSN:1063-7826
1090-6479
DOI:10.1134/S1063782616120174