Publication detail

Color switching of a terahertz quantum cascade laser

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

119104

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"
}