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Birefringence in an Incommensurate Structure: Rb2ZnCl4

Authors :
Jan Kroupa
Jan Fousek
Source :
Japanese Journal of Applied Physics. 24:787
Publication Year :
1985
Publisher :
IOP Publishing, 1985.

Abstract

Spontaneous birefringence δs Δ n in the INC and C phases of Rb2ZnCl4 crystals has been evaluated and shown to consist of contributions proportional to <r 2> and <r 6>, r denoting the order parameter modulus. Jump-like changes in Δ n of the order of 10-6 are observed at the INC-C transition. It is shown that they can be explained by a change D<r>/<r>\cong0.25% and by the occurrence of another contribution in the INC phase. The latter could originate from the fact that the light propagation may be affected by spatial modulation of optical permittivities. If temperature is cycled in the INC phase only, no hysteresis in Δ n is observed. This shows that-unlike static permittivity-optical properties of Rb2ZnCl4 are not sensitive to x> which is proportional to soliton density.

Details

ISSN :
13474065 and 00214922
Volume :
24
Database :
OpenAIRE
Journal :
Japanese Journal of Applied Physics
Accession number :
edsair.doi...........104a596b452e7e36a4d175d935c9a70d
Full Text :
https://doi.org/10.7567/jjaps.24s2.787