Abstract
We address the reorientational optical nonlinearity of homogeneously aligned neamtic liquid-crystal (NLC) cells. The propagation of light in NLC cells depend strongly on temperature. At a temperature approaching the clearing point, an undulating beam and multifocal points are observed in the NLC cell by use of a polarizing optical microscope. Using a conoscopic technique, we observed novel consecutive concentric and parabolic patterns projected onto a screen. Optical energy is considered to compete with thermal energy to affect NLC's orientation and to generate singularities in the steady state. A model of the configuration of the liquid crystal's orientation is proposed.
Original language | English |
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Pages (from-to) | 2357-2359 |
Number of pages | 3 |
Journal | Optics Letters |
Volume | 28 |
Issue number | 23 |
DOIs | |
Publication status | Published - 2003 Dec 1 |
All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics