✦ LIBER ✦

Excitation of Longitudinal Optical Phonons by Stimulated Raman Effect in Piezoelectric Cubic Crystals

✍ Scribed by L. Merten; R. Kotzott

Publisher: John Wiley and Sons
Year: 1983
Tongue: English
Weight: 385 KB
Volume: 120
Category: Article
ISSN: 0370-1972
DOI: 10.1002/pssb.2221200204

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✦ Synopsis

Abstract

It is shown that for special directions in piezoelectric cubic crystals Stokes and anti‐Stokes waves couple anharmonically also with longitudinal phonons. The dispersion functions of the coupled waves can be represented by simple analytic expressions, if the coupling with the anti‐Stokes waves is neglected. The wave vectors of the coupled waves are either real or pairs of complex conjugate quantities. In the frequency regions of complex‐conjugate wave vectors a coupled wave exists with an exponentially amplified longitudinal polariton wave. The properties of this wave are discussed in detail.

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