Enchancemnt of the optical power stimulated by impact ionization in GaSb-based heterostructures with deep quantum wells
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F13%3A00421578" target="_blank" >RIV/68378271:_____/13:00421578 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1117/12.2017124" target="_blank" >http://dx.doi.org/10.1117/12.2017124</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1117/12.2017124" target="_blank" >10.1117/12.2017124</a>
Alternative languages
Result language
angličtina
Original language name
Enchancemnt of the optical power stimulated by impact ionization in GaSb-based heterostructures with deep quantum wells
Original language description
We report on the observation of superlinear electroluminescence in nanoheterostructures based on GaSb with a deep narrow Al(As)Sb/InAsSb/Al(As)Sb QW in the active region, grown by MOVPE. Electroluminescence spectra for different driving currents were measured at temperatures of 77 and 300 K. It is shown that such structure exhibits superlinear dependence of optical power on the drive current and its increase of 2-3 times in the current range 50-200 mA. This occurs due to impact ionization in the Al(As)Sb/InAsSb quantum well in which a large band offset at the interface ?EC=1.27 eV exceeds ionization threshold energy for electrons in the narrow-gap well. Theoretical calculation of the size quantization energy levels is presented, and possible cases of impact ionization are considered. This effect can be used to increase quantum efficiency and optical power of light emitting devices (LEDs, lasers) operating in mid-IR spectral range, as well as for photovoltaic elements.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
BM - Solid-state physics and magnetism
OECD FORD branch
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Result continuities
Project
<a href="/en/project/GA13-15286S" target="_blank" >GA13-15286S: GaSb based nano-heterostructures with deep quantum well</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2013
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
INTEGRATED OPTICS: PHYSICS AND SIMULATIONS ( Proceedings of SPIE 8781)
ISBN
978-0-8194-9583-9
ISSN
0277-786X
e-ISSN
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Number of pages
9
Pages from-to
1-9
Publisher name
SPIE
Place of publication
BELLINGHAM
Event location
Prague
Event date
Apr 17, 2013
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
000323312700014