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Kainz, MA. Schonhuber, S. Limbacher, B. Andrews, AM. Detz, H. Strasser, G. Bastard, G. Unterrainer, K.
Original Title
Color switching of a terahertz quantum cascade laser
Type
journal article in Web of Science
Language
English
Original Abstract
The mode formation of a terahertz Quantum Cascade laser with two optical transitions is studied experimentally. The emission spectrum shows two well separated frequency regions at 3.4 THz and 3.8 THz corresponding to two different upper laser states j3i and j4i. From the relative strength of the two colors, population and electron scattering effects for the two states are investigated at different operating temperatures and in the presence of a strong magnetic field. At elevated temperatures, the population of state j3i is continuously reduced, resulting in only the 3.8 THz transition lasing at 140 K. For an applied magnetic field, the elastic scattering channel from j4i ! j3i is progressively suppressed, resulting in laser emission switching from 3.4 THz to 3.8 THz.
Keywords
Quantum Cascade laser
Authors
Kainz, MA.; Schonhuber, S.; Limbacher, B.; Andrews, AM.; Detz, H.; Strasser, G.; Bastard, G.; Unterrainer, K.
Released
13. 5. 2019
ISBN
0003-6951
Periodical
Applied Physics Letters
Year of study
114
Number
19
State
United States of America
Pages from
119104
Pages to
Pages count
5
URL
https://aip.scitation.org/doi/10.1063/1.5093901
BibTex
@article{BUT159147, author="Kainz, MA. and Schonhuber, S. and Limbacher, B. and Andrews, AM. and Detz, H. and Strasser, G. and Bastard, G. and Unterrainer, K.", title="Color switching of a terahertz quantum cascade laser", journal="Applied Physics Letters", year="2019", volume="114", number="19", pages="119104--119104", doi="10.1063/1.5093901", issn="0003-6951", url="https://aip.scitation.org/doi/10.1063/1.5093901" }