Liu, Y. J., Si, G. Y., Leong, E. S. P., Xiang, N., Danner, A. J. and Teng, J. H. (2012), Light-Driven Plasmonic Color Filters by Overlaying Photoresponsive Liquid Crystals on Gold Annular Aperture Arrays. Adv. Mater., 24: OP131–OP135. doi: 10.1002/adma.201104440
Light-driven plasmonic color filters are demonstrated by integrating gold annular aperture arrays with photoresponsive liquid crystals (LCs). Upon photoirradiation, a nematic−isotropic phase transition of the LCs arises from the trans–cis photoisomerization of photochromic LCs. As a consequence, the effective refractive index experienced by the impinging light changes, modulating the transmission intensity.