title: Optical switch of diffractive light from a BCT photonic crystal based on HPDLC doped with azo component.
abstract: This study demonstrates an optical switch of the diffractive light from a body-centered tetragonal photonic crystal based on holographic polymer-dispersed liquid crystals that are fabricated using two-beam interference with multiple exposures. The liquid crystal-rich regions form the lattice points of the PC, which contains a liquid crystal/azo-dye mixture. The concentration of the cis isomer changes under laser light exposure; this change, in turn, modulates the effective index of the LCs, and then switches diffractive light.
authors.affiliation: Department of Physics, National Cheng Kung University, Tainan 701, Taiwan.
authors.forename: Ming
authors.initials: M
authors.lastname: Shian Li
authors.forename: Andy Ying-Guey
authors.initials: AY
authors.lastname: Fuh
authors.forename: Shing-Trong
authors.initials: ST
authors.lastname: Wu