All optical tunable nematic liquid crystal waveguide

Trotta, Marco and Asquini, Rita and d'Alessandro, Antonio and Beccherelli, Romeo (2012) All optical tunable nematic liquid crystal waveguide. Molecular Crystals and Liquid Crystals, 558. pp. 204-208. ISSN 1563-5287

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In this paper we theoretically investigate the nonlinear behaviour of a rectangular liquid crystal waveguide. An optical beam of a C-Band laser, fiber coupled to the waveguide, modulates the refractive index of the liquid crystal core. Light propagation is obtained when the effective refractive index of the core exceed the cladding refractive index one. The cut-off condition can be determined by the initial alignment of the liquid crystal molecules and by the laser beam itself that excites optical nonlinearity due to optically induced reorientational effect. Low power optical control could be obtained with an optimization of the molecular alignment.

Item Type: Article
Uncontrolled Keywords: All-optical waveguides; electro-optic effect; liquid crystals; nonlinear optics
Subjects: 600 Tecnologia - Scienze applicate > 620 Ingegneria e attivita' affini > 621 Fisica applicata; Ingegneria meccanica > 621.3 Ingegneria elettrotecnica; Illuminazione; Superconduttivita'; Ingegneria magnetica; Ottica applicata; Tecnologia parafotica; Elettronica; Ingegneria delle comunicazioni; Elaboratori
Depositing User: Chiara D'Arpa
Date Deposited: 12 Mar 2013 16:17
Last Modified: 28 Jan 2016 16:33

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