The Study of Laser-Induced Holographic Grating in Azo Dye-Doped PMMA Thin Film With Liquid Crystals

• Main Authors: Shih-Pin Tsai, 蔡士斌
• Other Authors: Chie-Tong Kuo
• Format: Others
• Language: zh-TW
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/15526040556974238272

碩士 === 國立中山大學 === 物理學系研究所 === 91 === The laser-induced holographic gratings in the Azo dye-doped PMMA thin films with liquid crystal were investigated by changing the temperature of the sample, the angle of two writing beams and the rubbing. The high power Q-switch pulse laser has been used as the writing beams and the He-Ne cw laser has been used as a real-time probe beam to detect the first order diffraction singals. The grating are the results of photo-isomerization of azo dye and diffusions of liquid crystal. The model has been established to analyze the first order diffraction signals in order to understand the mechanism of grating and the effect of temperature and angle.