Phase-change perovskite metasurfaces for dynamic color tuning

• Main Authors: Tian, Jingyi, Cortecchia, Daniele, Wang, Yutao, Liu, Hailong, Feltri, Elena, Liu, Hong, Adamo, Giorgio, Soci, Cesare
• Other Authors: School of Physical and Mathematical Sciences
• Format: Article
• Language: English
• Published: 2022
• Subjects: Science::Physics; Experimental and numerical data; Dynamic color tuning; Halide perovskite; Metasurfaces; Phase-change
• Online Access: https://hdl.handle.net/10356/159267
• Institution: Nanyang Technological University

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