Color switching of a terahertz quantum cascade laser
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F19%3APU133597" target="_blank" >RIV/00216305:26620/19:PU133597 - isvavai.cz</a>
Result on the web
<a href="https://aip.scitation.org/doi/10.1063/1.5093901" target="_blank" >https://aip.scitation.org/doi/10.1063/1.5093901</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1063/1.5093901" target="_blank" >10.1063/1.5093901</a>
Alternative languages
Result language
angličtina
Original language name
Color switching of a terahertz quantum cascade laser
Original language description
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.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
<a href="/en/project/EF16_027%2F0008371" target="_blank" >EF16_027/0008371: International mobility of researchers at the Brno University of Technology</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2019
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Applied Physics Letters
ISSN
0003-6951
e-ISSN
1077-3118
Volume of the periodical
114
Issue of the periodical within the volume
19
Country of publishing house
US - UNITED STATES
Number of pages
5
Pages from-to
119104-119104
UT code for WoS article
000470152800024
EID of the result in the Scopus database
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