Phase-change perovskite metasurfaces for dynamic color tuning

Abstract Halide perovskite metasurfaces are attracting increasing interest for applications in light-emitting and display technologies. To access the wide range of colors required these applications, main mechanism exploited thus far has been chemical engineering compounds – this constitutes a significant limitation dynamic switching optical response desirable actual devices. Here we demonstrate polarization-dependent, control structural color emission wavelength an all-dielectric phase-change halide nanograting metasurface, by temperature tuning. This is underpinned change constants which accompanies its phase-transition around room temperature. The functionalities demonstrated our work bearing potential devices, displays spatial-light-modulators.