Tian Jingyi, Cortecchia Daniele, Wang Yutao, Liu Hailong, Feltri Elena, Liu Hong, Adamo Giorgio, Soci Cesare
Centre for Disruptive Photonic Technologies, TPI, Nanyang Technological University, 21 Nanyang Link, Singapore 63737, Singapore.
Division of Physics and Applied Physics, School of Physical and Mathematical Sciences, Nanyang Technological University, 21 Nanyang Link, Singapore 637371, Singapore.
Nanophotonics. 2022 Jun 6;11(17):3961-3968. doi: 10.1515/nanoph-2022-0143. eCollection 2022 Sep.
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.
卤化物钙钛矿超表面在发光和显示技术应用中越来越受到关注。为了获得这些应用所需的广泛颜色范围，迄今为止所利用的主要机制是对钙钛矿化合物进行化学工程处理——这对实际器件中所需的光学响应动态切换构成了重大限制。在此，我们通过温度调谐，展示了在全介质相变卤化物钙钛矿纳米光栅超表面中对结构颜色和发射波长的偏振相关动态控制。这是由钙钛矿光学常数在室温附近发生相变时的显著变化所支撑的。我们工作中展示的这些功能在发光器件、显示器和空间光调制器中具有应用潜力。
