Journal Article Direct observation of coupling between orientation and flow fluctuations in a nematic liquid crystal at equilibrium

Orihara, Hiroshi  ,  Sakurai, Nobutaka  ,  Sasaki, Yuji  ,  Nagaya, Tomoyuki

95 ( 4 )  , p.42705 , 2017-04-21 , American Physical Society (APS)
ISSN:2470-0045
Description
To demonstrate coupling between orientation and flow fluctuations in a nematic liquid crystal at equilibrium, we simultaneously observe the intensity change due to director fluctuations under a polarizingmicroscope and the Brownian motion of a fluorescent particle trapped weakly by optical tweezers. The calculated cross-correlation function of the particle position and the spatial gradient of the intensity is nonzero, clearly indicating the existence of coupling.
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http://eprints.lib.hokudai.ac.jp/dspace/bitstream/2115/66171/1/PhysRevE.95.042705.pdf

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