||Direct observation of coupling between orientation and flow fluctuations in a nematic liquid crystal at equilibrium
Orihara, Hiroshi ,
Sakurai, Nobutaka ,
Sasaki, YujiNagaya, Tomoyuki
, p.42705 , 2017-04-21 , American Physical Society (APS)
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.