DocumentCode
1487816
Title
Low-voltage terahertz quantum-cascade lasers based on LO-phonon-assisted interminiband transitions
Author
Wienold, M. ; Schrottke, L. ; Giehler, M. ; Hey, Roger ; Anders, W. ; Grahn, H.T.
Author_Institution
Paul-Drude-Inst. fur Festkorperelektronik, Berlin, Germany
Volume
45
Issue
20
fYear
2009
Firstpage
1030
Lastpage
1031
Abstract
A report is presented on GaAs/(Al,Ga)As terahertz (THz) quantum-cascade lasers (QCLs) based on alternating photon and longitudinal optical (LO) phonon-assisted transitions between quasi-minibands. The design is optimised for low threshold current densities and low operating voltages, resulting in reduced ohmic heating during continuous-wave (CW) operation. The QCLs exhibit lasing over a broad range of frequencies from 2.91 to 3.21 THz. Using single-plasmon waveguides, pulsed operation up to 114 K and CW operation up to 65 K has been achieved.
Keywords
phonons; quantum cascade lasers; submillimetre wave lasers; current density; frequency 2.91 THz to 3.21 THz; longitudinal optical phonons; phonon-assisted interminiband transitions; quantum-cascade lasers; submillimetre wave lasers;
fLanguage
English
Journal_Title
Electronics Letters
Publisher
iet
ISSN
0013-5194
Type
jour
DOI
10.1049/el.2009.1371
Filename
5270384
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