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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 1:32 |
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Conference: Bucharest University Faculty of Physics 2003 Meeting
Section: Atomic and Molecular Physics; Astrophysics
Title:
Dye-Doped Nematic Liquid Crystal Reorientation in a Linear Polarizad Laser Field: Threshold Effect
Authors:
Nicoleta Eseanu*, Cornelia Uncheselu**, Ion Palarie***
Affiliation:
*Department of Physics, University "Politehnica" of Bucharest, Splaiul
Independentei 313, Bucharest
**Department pf Physics, Civil Engineering University, Bucharest
***Faculty of Physics, University of Craiova, Craiova
E-mail
Keywords:
Abstract:
An experimental study of the molecular orientation induced by a olarized Ar+ laser beam in a dye doped nematic liquid crystal has been done. A sandwich type sample filled with 5CB+MR(2%) was aligned approximately planar by two glass surfaces, only one surface being rubbed. By measuring a He-Ne probe beam intensity in time, a threshold effect has been observed when modifying the Ar+ laser power. This could be explained by using the percolation theory.
References
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2. E. Ouskova, Y. Reznikov, S.V. Shiyanovskii, L.Su, J.L. West,O.V. Kuksenok, O. Francescangeli, F. Simoni - Phys. Rev.E, vol.64, (2001) 051709
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