Published 2008 | Version v1
Journal article Metadata-only

Inefficiency of intervalley transfer in narrow InGaAs/AlAsSb quantum wells

Creators

  • 1. Institute of Ion Beam Physics and Materials Research, Forschungszentrum Dresden-Rossendorf, P.O. Box 510119, 01314 Dresden (Germany)
  • 2. Department of Physics, University of Konstanz, 78457 Konstanz (Germany)
  • 3. Fraunhofer Institute for Telecommunications, 10587 Berlin (Germany)

Description

By using femtosecond pump-probe spectroscopy we investigate the intersubband relaxation dynamics in narrow InGaAs/AlAsSb quantum wells. A biexponential behavior is an indication of intervalley scattering, which is, however, much slower than known from bulk material. This may be the reason why quantum cascade lasers at wavelengths as short as 3 μm are actually functioning In addition, when pumping slightly below resonance we observe an induced transient absorption, which can be interpreted in terms of electron heating within the first subband. (copyright 2008 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim) (orig.)

Availability note (English)

Available from http://dx.doi.org/10.1002/pssc.200776556

Additional details

Identifiers

DOI
10.1002/pssc.200776556;

Publishing Information

Journal Title
Physica Status Solidi. C, Conferences
Journal Volume
5
Journal Issue
1
Journal Page Range
p. 229-231
ISSN
1610-1634

Conference

Title
15. International conference on nonequilibrium carrier dynamics in semiconductors
Dates
23-27 Jul 2007
Place
Tokyo (Japan)

INIS

Country of Publication
Germany
Country of Input or Organization
Germany
INIS RN
39020259
Subject category
S36: MATERIALS SCIENCE;
Resource subtype / Literary indicator
Conference
Descriptors DEI
ABSORPTION; ALUMINIUM ARSENIDES; ANTIMONIDES; BAND THEORY; ELECTRONIC STRUCTURE; GALLIUM ARSENIDES; INDIUM ARSENIDES; OPTICAL PUMPING; QUANTUM WELLS; RELAXATION; SEMICONDUCTOR MATERIALS; TRANSIENTS; WAVE FUNCTIONS
Descriptors DEC
ALUMINIUM COMPOUNDS; ANTIMONY COMPOUNDS; ARSENIC COMPOUNDS; ARSENIDES; FUNCTIONS; GALLIUM COMPOUNDS; INDIUM COMPOUNDS; MATERIALS; NANOSTRUCTURES; PNICTIDES; PUMPING; SORPTION

Optional Information

Notes
With 3 figs., 12 refs.. SICI: 1610-1634(200801)5:1<229::AID-PSSC200776556>3.0.TX;2-X