Broadening and splitting of emission spectra of a GaInAs/AlInAs quantum cascade laser in a quantising magnetic field

We have studied the effect of a relatively weak quantising magnetic field on emission spectra of a GaInAs/AlInAs quantum cascade laser near 10 K. The results demonstrate that, as the magnetic field induction increases to 7 T, the spectra broaden (to 5 meV) and split into three emission bands. As a r...

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Published inQuantum electronics (Woodbury, N.Y.) Vol. 43; no. 2; pp. 144 - 146
Main Authors Zasavitskii, I I, Pashkeev, D A, Bushuev, E V, Mikaelyan, G T
Format Journal Article
LanguageEnglish
Published United States 01.01.2013
Subjects
ALUMINIUM COMPOUNDS
Band spectra
Bands
CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
EMISSION SPECTRA
FLUCTUATIONS
INDIUM ARSENIDES
LASERS
Lasing
LINE BROADENING
MAGNETIC FIELDS
MEV RANGE
PHONONS
QUANTIZATION
Quantum cascade lasers
RESONANCE
Spectral emissivity
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Summary:We have studied the effect of a relatively weak quantising magnetic field on emission spectra of a GaInAs/AlInAs quantum cascade laser near 10 K. The results demonstrate that, as the magnetic field induction increases to 7 T, the spectra broaden (to 5 meV) and split into three emission bands. As a result, we observe simultaneously up to 80 longitudinal lasing modes in the three bands and the integrated laser output intensity increases 70 times. The presence of bands in the emission spectra can be accounted for in terms of the magnetic quantisation of the laser levels into spin-split Landau levels. The increase in emission intensity is attributable primarily to phonon resonance adjustment in a magnetic field.
Bibliography:ObjectType-Article-1
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ISSN:1063-7818
1468-4799
DOI:10.1070/QE2013v043n02ABEH015077