title: Optically switchable gratings based on azo-dye-doped, polymer-dispersed liquid crystals.
abstract: We report a holographically fabricated, optically switchable grating using azo-dye-doped, polymer-dispersed liquid crystals (LCs). Our experiments show that upon photoirradiation, the diffraction of the grating was decreased significantly. We believe that this switching behavior is due to two factors--nematic-isotropic phase transition of LCs and thermal expansion of the grating structure.
authors: Department of Engineering Science, The Pennsylvania State University, University Park, Pennsylvania 16802, USA.
authors: Yan Jun
authors: YJ
authors: Liu
authors: Yue Bing
authors: YB
authors: Zheng
authors: Jinjie
authors: J
authors: Shi
authors: Hua
authors: H
authors: Huang
authors: Thomas R
authors: TR
authors: Walker
authors: Tony Jun
authors: TJ
authors: Huang