Title :
Control of diffraction from permanent gratings in dye doped liquid crystals
Author :
Kaczmarek, M. ; Cudney, R.S.
Author_Institution :
Dept. of Phys. & Astron., Southampton Univ., UK
Abstract :
Summary form only given. Photorefractive-like liquid crystals are one of the most efficient optical nonlinear materials developed so far. Their thin film format (typically between 10-25 /spl mu/m), ideal for integrated optics applications, is accompanied by large diffraction efficiencies and high coupling coefficients.We observed that permanent gratings can be created in dye-doped photorefractive liquid crystals and their diffraction efficiency controlled by electric field. The gratings were written in 12 /spl mu/m thick 5CB liquid crystal cells doped with a relatively high concentration (above 1%) of a methyl red dye.
Keywords :
diffraction gratings; dyes; electro-optical devices; liquid crystal devices; molecular orientation; nonlinear optics; optical films; photorefractive materials; 10 to 25 micron; 12 micron; 5CB liquid crystal cells; diffraction efficiency; dye doped liquid crystals; dye-doped photorefractive liquid crystals; electric field; high coupling coefficient; integrated optics; large diffraction efficiencies; methyl red dye; optical nonlinear materials; permanent gratings; photorefractive-like liquid crystals; thin film format; Crystalline materials; Diffraction gratings; Integrated optics; Liquid crystals; Nonlinear optics; Optical diffraction; Optical films; Optical materials; Photorefractive materials; Transistors;
Conference_Titel :
Lasers and Electro-Optics, 2001. CLEO '01. Technical Digest. Summaries of papers presented at the Conference on
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
1-55752-662-1
DOI :
10.1109/CLEO.2001.947965
