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GaAs/AlGaAs quantum cascade laser – a source for gas absorption spectroscopy

✍ Scribed by L Hvozdara; S Gianordoli; G Strasser; W Schrenk; K Unterrainer; E Gornik; Ch.S.S.S Murthy; M Kraft; V Pustogow; B Mizaikoff


Publisher
Elsevier Science
Year
2000
Tongue
English
Weight
133 KB
Volume
7
Category
Article
ISSN
1386-9477

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The excitonic subband transitions of (100)- and (311)A-oriented GaAs/AlGaAs single quantum wells (SQW's) are investigated using electroreflectance spectroscopy. The strong Franz-Keldysh-Oscillations arising from the undoped AlGaAs barrier layers are analyzed to determine the field strength within th