Self Ordering of Nematic Liquid Crystal Molecules in HPDLC Bragg Gratings
CHENG Wen-Kai, GAO Bin, PU Hai-Hui, LIU Jian-Hua**
Department of Optical Science and Engineering, Key Lab for Micro and Nanophotonic Structures (Ministry of Education), Shanghai Ultra-Precision Optical Manufacturing Engineering Center, Fudan University, Shanghai 200433
Self Ordering of Nematic Liquid Crystal Molecules in HPDLC Bragg Gratings
CHENG Wen-Kai, GAO Bin, PU Hai-Hui, LIU Jian-Hua**
Department of Optical Science and Engineering, Key Lab for Micro and Nanophotonic Structures (Ministry of Education), Shanghai Ultra-Precision Optical Manufacturing Engineering Center, Fudan University, Shanghai 200433
Abstract：Using the simple treatments of back refilling and subsequent annealing above the clear point of the liquid crystal, the self ordering of liquid crystal molecules is observed in a holographic polymer dispersed liquid crystal (HPDLC) Bragg grating without orientational layers or mechanical rubbing. Transmittance curve fitted anisotropy of the liquid crystal (Δn) is in good agreement with its nominal value.
2012, Vol. 29 
