Nonconventional calculation of the second order susceptibility in polar semiconductors

We propose a model for the calculation of the second order susceptibilities of groups II-VI and III-V compound semiconductors. The model is based on the assumption that the dominant effect that contributes to the second harmonic generation is the variation of the polar charge of the bond under the a...

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Bibliographic Details
Published in:Journal of physics. Condensed matter 2003-09, Vol.15 (37), p.L559-L564
Main Author: Popa, Alexandru
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation
Optical properties of bulk materials and thin films
Physics
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Summary:We propose a model for the calculation of the second order susceptibilities of groups II-VI and III-V compound semiconductors. The model is based on the assumption that the dominant effect that contributes to the second harmonic generation is the variation of the polar charge of the bond under the action of the laser radiation field. We show that a simple relation for the second order susceptibility in terms of the basic parameters of the bond follows from the dielectric theory of Phillips. This relation is checked for many experimental values for nonlinear susceptibilities of polar semiconductor compounds taken from the literature.
ISSN:0953-8984
1361-648X
DOI:10.1088/0953-8984/15/37/L01