Tunable Color Filter Based on Optomechanical Plasmonic Device

We report the results on the optical properties of a nanocomposite that comprises 100 nm in diameter silver nanoparticles and elastic polymer matrix. The nanoparticles form planar two-dimensional array embedded into the polymer. The average distance between nanoparticles is about 100- 200 nm that provides electrodynamic coupling between plasmon resonances in adjacent particles. Stretching of the elastic polymer film leads to the increase of the distance between nanoparticles and, in turn, alters optical response of the array. Changes of the optical properties can be monitored visually as continuous changing of the color of the nanocomposite. Thus, a color-tuning filter is realized. Chromaticity coordinates for this tunable filter are presented in CIE xyY color space.