Detail publikačního výsledku

Color switching of a terahertz quantum cascade laser

Kainz, MA.; Schonhuber, S.; Limbacher, B.; Andrews, AM.; Detz, H.; Strasser, G.; Bastard, G.; Unterrainer, K.

Originální název

Color switching of a terahertz quantum cascade laser

Anglický název

Color switching of a terahertz quantum cascade laser

Druh

Článek WoS

Originální abstrakt

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.

Anglický abstrakt

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.

Klíčová slova

Quantum Cascade laser

Klíčová slova v angličtině

Quantum Cascade laser

Autoři

Kainz, MA.; Schonhuber, S.; Limbacher, B.; Andrews, AM.; Detz, H.; Strasser, G.; Bastard, G.; Unterrainer, K.

Rok RIV

2020

Vydáno

13.05.2019

ISSN

0003-6951

Periodikum

Applied Physics Letters

Svazek

114

Číslo

19

Stát

Spojené státy americké

Strany od

119104

Strany do

119104

Strany počet

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"
}