Birefringence Grating and Surface Grating in Azobenzene Polymer Liquid Crystal Films Investigated by Near-Field Optical Method
Year: 2003
Type: article
Abstract: The birefringence grating and the surface grating in azobenzene polymer liquid-crystal (Azo-PLC) films are studied by a near-field scanning optical microscope. With laser irradiation, the refractive index change caused by birefringence and the sinusoidal surface profile are observed at the near-field transmittance image and the surface topography of the grating. The grating period and the peak-to-peak value of the sinusoidal surface profile are 0.8 µm and 40 nm, respectively. The maximum diffractive efficiency of the grating is 2%. The dynamic process of the grating formation is probed and analysed. The mass diffusion responsible for the formation of the surface grating due to the temperature rise is analysed.
Source: Chinese Physics Letters
Authors: Zhang Jiang-Ying, Ming Hai, Wang Pei, Sun Xiao-Hong, Lu Yong-Hua, Wu Yun-Xia, Xie Jian-Ping, Zhang Qi-Jin, Liu Jian, Xie Ai-Fang, Zhang Ze-Bo, Gu Ben-Yuan
Language: English
Field: Materials Science
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W1609609682