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.
© 2011 Optical Society of America
Original Manuscript: June 22, 2011
Revised Manuscript: August 22, 2011
Manuscript Accepted: August 31, 2011
Published: September 26, 2011
Ming Shian Li, Andy Ying-Guey Fuh, and Shing-Trong Wu, "Optical switch of diffractive light from a BCT photonic crystal based on HPDLC doped with azo component," Opt. Lett. 36, 3864-3866 (2011)