Measurement of anchoring coefficient of homeotropically aligned nematic liquid crystal using a polarizing optical microscope in reflective mode
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چکیده
منابع مشابه
Rayleigh-Bénard convection in a homeotropically aligned nematic liquid crystal
We report experimental results for convection near onset in a thin layer of a homeotropically aligned nematic liquid crystal heated from below as a function of the temperature difference DT and the applied vertical magnetic field H . When possible, these results are compared with theoretical calculations. The experiments were done with three cylindrical cells of aspect ratios @~radius!/~height!...
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We present experimental measurements near the onset of electroconvection (EC) of homeotropically aligned nematic liquid crystals Phase 5A and MBBA. A voltage of amplitude square root 2V0 and frequency f was applied. With increasing V0, EC occurred after the bend Freedericksz transition. We found supercritical bifurcations to EC that were either stationary bifurcations or Hopf bifurcations to tr...
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The orientational dynamics of a homeotropically aligned nematic liquid crystal, 4'-pentyl-4-biphenylcarbonitrile (5-CB), is studied over more than six decades of time (500 fs to 2 mus) using optical heterodyne detected optical Kerr effect experiments. In contrast to the dynamics of nematogens in the isotropic phase, the data do not decay as a highly temperature-dependent exponential on the long...
متن کاملOptical measurement of azimuthal anchoring strength in nematic liquid crystals.
We have observed the azimuthal switching at the interface of nematic liquid crystals (LCs) and the aligning substrate, induced by the planar electric field of a fine comb electrode. Optical transmittance as a function of applied voltage was modeled by both the elastic theory with rigid anchoring and the Landau-de Gennes theory with the interfacial energy expression 1/2Wtr[(Q two down arrows -Q ...
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ژورنال
عنوان ژورنال: AIP Advances
سال: 2015
ISSN: 2158-3226
DOI: 10.1063/1.4931950