Nonlinear excitonic absorption in (Zn,Mn)Se superlattices and ZnSe films
作者:
D. R. Andersen,
L. A. Kolodziejski,
R. L. Gunshor,
S. Datta,
A. E. Kaplan,
A. V. Nurmikko,
期刊:
Applied Physics Letters
(AIP Available online 1986)
卷期:
Volume 48,
issue 23
页码: 1559-1561
ISSN:0003-6951
年代: 1986
DOI:10.1063/1.96866
出版商: AIP
数据来源: AIP
摘要:
Optical transmission studies have been performed on ZnSe thin films and two (Zn,Mn)Se superlattices (Eg&bartil;2.8 eV) of varying barrier compositions and well widths grown by molecular beam epitaxy. The excitons in these samples ranged in character from three dimensional to quasi two dimensional. The spectra, obtained at 77 K as a function of incident light intensity, clearly show the saturation of the excitonic resonance. This is the first demonstration of nonlinear excitonic absorption in the (Zn,Mn)Se system. Mechanisms for the saturation are discussed with estimates for the relative contributions from Coulombic screening and phase space filling.
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