Dynamic selection of visible wavelengths using resonant TiO₂ nanostructures

Abstract All-dielectric nanoarrays have strong electromagnetic resonances with various interesting applications and are tuned by adjusting their geometrical parameters. However, optical properties permanently encoded during fabrication. This study presents robust dynamically tunable all-dielectric nanoresonators for controllable, reversible, reproducible color filtering. Our design uses an array of TiO 2 nanodiscs embedded in a transparent, stretchable polydimethylsiloxane (PDMS) membrane exhibits narrow spectral response due to Mie magnetic electric dipole hybridized the lattice modes. By mechanically stretching PDMS membrane, pitch was increased location altered. Additionally, optically asymmetric structure fabricated partially embedding PDMS. Thus, magnitude Rayleigh anomaly diffraction, which could interrupt resonances, reduced. has sharp, frequency-tunable visible spectrum, we demonstrated dynamic tunability metasurfaces.