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Screening of the n=2 excitonic resonance by hot carriers in an undoped Ga0.47In0.53As/Al0.48In0.52As multiple quantum well structure

✍ Scribed by H. Lobentanzer; W. Stolz; K. Ploog; R.J. Bäuerle; T. Elsaesser

Publisher
Elsevier Science
Year
1989
Tongue
English
Weight
270 KB
Volume
32
Category
Article
ISSN
0038-1101

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Observation of confined states in anIn0.53Ga0.47As/In0.52Al0.48Asmulti-quantum wells structure by quantum confined Stark effects
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Photocurrent spectra in an In 0.53 Ga 0.47 As/In 0.52 Al 0.48 As multi-quantum wells structure containing 9.4 nm wide wells were measured at room temperature in electric fields. The exciton peaks of ground-state transitions shifted fairly in 167 kV cm -1 as the quantum confined Stark effect. Stark s

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We observed that a series of peaks, which were clearly extracted from a photocurrent difference spectrum, corresponded to interband optical transitions of an In 0.53 Ga 0.47 As/ In 0.52 Al 0.48 As multi-quantum wells structure. The nonparabolic tendency of the electron effective mass was suggested f