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Proceedings Paper

Colossal optical nonlinear effects in the nematic-isotropic temperature transition in azo dye-doped liquid crystals
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Paper Abstract

We report a new class of colossal nonlinear effects observed at the nematic-isotropic temperature transition. Large diffraction efficiency (30%) and colossal nonlinear refractive index (n2≈200 cm2/W) has been measured in randomly oriented thin (1 μm) films of 5CB liquid crystals doped with small quantities of the azo dye methyl red (1% wt). Additionally, the dye reduces the phase transition temperature of the liquid crystal by almost 4 degrees C. We also found that ITO-coated glass substrate gives larger diffraction efficiency than those where only glass was used.

Paper Details

Date Published: 30 August 2005
PDF: 8 pages
Proc. SPIE 5936, Liquid Crystals IX, 59360Y (30 August 2005); doi: 10.1117/12.615504
Show Author Affiliations
I. Lazo-Martinez, Instituto Nacional de Astrofisica, Optica y Electronica (Mexico)
I. Guizar-Iturbide, Instituto Nacional de Astrofisica, Optica y Electronica (Mexico)
A. Olivares-Perez, Instituto Nacional de Astrofisica, Optica y Electronica (Mexico)
C. G. Trevino-Palacios, Instituto Nacional de Astrofisica, Optica y Electronica (Mexico)
R. Ramos-Garcia, Instituto Nacional de Astrofisica, Optica y Electronica (Mexico)


Published in SPIE Proceedings Vol. 5936:
Liquid Crystals IX
Iam-Choon Khoo, Editor(s)

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