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2008 | 113 | 3 | 787-794
Article title

Experimental Investigation of Hot Carriers in Terahertz Quantum Cascade Lasers

Content
Title variants
Languages of publication
EN
Abstracts
EN
The nature of the electron distribution and the electron-lattice energy relaxation phenomena in all classes of quantum cascade lasers operating in the THz range, namely, resonant-phonon, bound-to-continuum, and interlaced photon-phonon designs are reviewed. Thermalized hot-electron distributions are found in all cases. However, electronic temperatures of individual conduction subband are strongly influenced by the specific quantum design and the actual electron-lattice energy relaxation channels. A wealth of information was obtained both below and above laser threshold from the analysis of micro-probe band-to-band photoluminescence spectra recorded with a spatial resolution of ≈2 μm. The influence of the detailed knowledge of the hot electron distributions on the design of improved THz quantum cascade lasers aiming at high temperature operation will be discussed.
Keywords
EN
Year
Volume
113
Issue
3
Pages
787-794
Physical description
Dates
published
2008-03
received
2007-08-26
References
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Document Type
Publication order reference
YADDA identifier
bwmeta1.element.bwnjournal-article-appv113n304kz
Identifiers
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