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Degenerate four-wave mixing effect due to thermally induced index grating is studied in liquid crystal MBBA. By measuring the relaxation time of the thermal grating decay, we obtain the diffusion coefficient of MBBA in its isotropic phase, i.e., D=8.6×10-4cm·S-1 at T = 45.1℃.
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中国科学院物理研究所
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Publishing process
- Received Date:
09 April 1983
- Published Online:
05 February 1984
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