Spectroscopy of Liquid Crystals

Chandrasekhar, S.; Madhusudana, N. V.

doi:10.1080/05704927208082246

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1973

2015

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Cited by 24 publications

(2 citation statements)

References 313 publications

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“…It seems likely that in emulsions of 5CB (or MBBA) with lyotropic nematics, which contained water and ethylenglycol [3], the HAND films of 5CB (or MBBA) with free upper boundary were in fact created on the surface of isotropic liquid. In impure nematics [4,5] the action of the splay cancelling principle may be initiated by the spontaneous curvature induced by impurities.…”

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confidence: 99%

Defects in Degenerate Hybrid Aligned Nematic Liquid Crystals

Lavrentovich

Nastishin

1990

Europhys. Lett.

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Defects in Degenerate Hybrid Aligned Nematic Liquid Crystals

Lavrentovich

Nastishin

1990

Europhys. Lett.

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“…Note that the sample transmissivity is an adequate order parameter that characterizes the transition, showing the bi-stable loop between the two phases. It is well-known that the nematic-isotropic transition is of first order [22]. The transition can be described analytically by considering a phenomenological one-dimensional bi-stable model in inhomogeneous media [23][24][25]:…”

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Photo-isomerization fronts in dye-doped nematic liquid crystals

et al. 2014

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An experimental study of the photo-isomerization dynamics in dye-doped nematic crystals is reported, which shows that, when the sample is illuminated by a Gaussian beam, and for high enough input power, a transition from the nematic to the isotropic phase takes place in the illuminated area. The two phases are spatially connected via a front propagating outward from the center of the beam and following the local intensity profile and thus inducing a photo-controlled optical aperture. The optical intensity and temperature fields on the sample follow the same dynamical profile. The front dynamics is described by a phenomenological bi-stable model with an inhomogeneous control parameter, directly related to the beam intensity profile.

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