New non-reorientational optical nonlinear effect in MBBA

Menéndez-Valdés Álvarez, Pedro and Martín Pereda, José Antonio (1987). New non-reorientational optical nonlinear effect in MBBA. "Molecular Crystals and Liquid Crystals", v. 149 (n. 1); pp. 303-316. ISSN 1542-1406.

Description

Title: New non-reorientational optical nonlinear effect in MBBA
Author/s:
  • Menéndez-Valdés Álvarez, Pedro
  • Martín Pereda, José Antonio
Item Type: Article
Título de Revista/Publicación: Molecular Crystals and Liquid Crystals
Date: 1987
ISSN: 1542-1406
Volume: 149
Subjects:
Freetext Keywords: Nonlinear optics; nematic; self-focusing_diffraction; state diagram
Faculty: E.T.S.I. Telecomunicación (UPM)
Department: Tecnología Fotónica [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

A new effect producing self-focusing of light in a nematic MBBA film is reported. This effect produces a static diffraction pattern composed of circular rings which is different from the ones arising from self-focusing previously reported. The influence of the cell thickness, the optical intensity, and the wavelength is studied. Once the nematic is distorted by a láser beam, the effect produced in other light beam passing through the modified región is independent of its polarization. This isotropic behavior shows that a molecular reorientation has not been produced. The origin of this effect seems to be the same of that of the effect which produces a randomly oscillating diffraction pattern previously reported by our group. Some possible causes such as thermal indexing, convective instabilities and self-induced transparency are discussed.

More information

Item ID: 39808
DC Identifier: http://oa.upm.es/39808/
OAI Identifier: oai:oa.upm.es:39808
Deposited by: Biblioteca ETSI Telecomunicación
Deposited on: 04 Apr 2016 12:43
Last Modified: 04 Apr 2016 12:43
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