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Photoluminescence and Photomodulation Spectroscopy of CdTe/Cd1−xMnxTe:In Multiple Quantum Wells

Published online by Cambridge University Press:  15 February 2011

S. Jiang ,
L.J. Zhang ,
J.M. Zhang  and
S.C. Shen
S. Jiang
Affiliation:
CCAST(World Laboratory) P.O.Box 8730, Beijing 100080, CHINA
L.J. Zhang
Affiliation:
National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Academia Sinica, Shanghai 200083, CHINA
J.M. Zhang
Affiliation:
National Laboratory for Infrared Physics, Shanghai Institute of Technical Physics, Academia Sinica, Shanghai 200083, CHINA
S.C. Shen
Affiliation:
CCAST(World Laboratory) P.O.Box 8730, Beijing 100080, CHINA
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Abstract

The photomodulated reflectivity (PR) spectroscopy of modulation-doped diluted magnetic semiconductor Cd0.72 Mn0.28 Te:In/CdTe multiple quantum wells has been measured at 20 K – 300 K. Several spectral features associated with intersubband transitions have been found. The feature associated with Fermi level is first reported in PR spectra of II–VI heterostructures. In addition, a abnormal transition intensity ratio of 22H to 11H caused by electron filled effect has been reported. The Photoluminescence(PL) spectra of the sample have also been measured at 10 K – 300 K. A strong enhancement of the photoluminescence intensity towards the electron Fermi energy, which is caused by multiple electron-hole scattering processes, is reported. The temperature dependence of the Fermiedge singularity has been measured and discussed. The mechanism of the Fermi-edge singularity can be explained by hole localization.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 299: Symposium C2 – Infrared Detectors--Materials, Processing, and Devices , 1994 , 59
Copyright
Copyright © Materials Research Society 1994

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