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Proceedings Paper

Plasma Dynamics And Picosecond Optical Properties Of CdTe
Author(s): J. H. Collet; W. W. Ruhle; M. Pugnet; K. Leo; A. Million
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Paper Abstract

Electron-hole pairs have been created in a near infrared II-VI semiconductor, CdTe, by picosecond optical pumping. The plasma relaxation dynamics have been investigated using time resolved luminescence technique. The plasma temperature and the bandgap renormalization are studied during the relaxation regime following the excitation pulse. Luminescence data are analysed in the frame of the standard free-particle model and also including the carrier dampings calculated in the plasmon pole approximation. In both cases, we conclude that the plasma cooling is slowed down at high initial plasma density (typically for p ≥ (3-4) x 1017/cm3). Nevertheless, the temperatures deduced during the relaxation kinetics are significantly lower when damping is taken into account. Band gap renormalization is also studied. The experimental results are in reasonable agreement with the usual gap shrinkage theories.

Paper Details

Date Published: 22 December 1989
PDF: 6 pages
Proc. SPIE 1127, Nonlinear Optical Materials II, (22 December 1989); doi: 10.1117/12.961401
Show Author Affiliations
J. H. Collet, CNRS-INSA (France)
Max Planck Institut fur Festkorperforschung (Germany)
W. W. Ruhle, Max Planck Institut fur Festkorperforschung (Germany)
M. Pugnet, CNRS-INSA (France)
K. Leo, Max Planck Institut fuk Festkorperforschung (Germany)
A. Million, LETI (France)

Published in SPIE Proceedings Vol. 1127:
Nonlinear Optical Materials II
Jean-Bernard Grun, Editor(s)

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