Recently, metasurfaces based on phase-change materials (PCMs) have attracted increasing attention due to the dramatic optical properties contrast between amorphous and crystalline states. The chalcogenide PCMs can be reversibly switched by electrical or optical pulses, offering tunability and reconfigurability for the metasurfaces. In this Perspective, the latest achievements and ongoing development in reconfigurable metasurfaces based on chalcogenide PCMs are presented, including the applications in nonlinear optics, anapole control, beam steering, perfect absorbers, and polaritons. This Perspective ends with perspectives for the growing demands of PCMs based on metasurfaces.

中文翻译：

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基于Ge-Sb-Te相变材料的超表面研究进展

最近，由于非晶态和晶态之间显着的光学性质对比，基于相变材料 (PCM) 的超表面引起了越来越多的关注。硫族化物 PCM 可以通过电或光脉冲可逆地切换，为超表面提供可调谐性和可重构性。在这个视角中，介绍了基于硫族化物 PCM 的可重构超表面的最新成就和正在进行的发展，包括在非线性光学、anapole 控制、光束控制、完美吸收器和极化子中的应用。这个观点以对基于超表面的 PCM 不断增长的需求的观点结束。