Electrically Driven Tunable Broadband Polarization States via Active Metasurfaces Based on Joule-Heat-Induced Phase Transition of Vanadium Dioxide,Laser & Photonics Reviews

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Electrically Driven Tunable Broadband Polarization States via Active Metasurfaces Based on Joule-Heat-Induced Phase Transition of Vanadium Dioxide
Laser & Photonics Reviews ( IF 9.8 ) Pub Date : 2021-08-16 , DOI: 10.1002/lpor.202100155
Fang‐Zhou Shu ₁ , Jia‐Nan Wang ₁ , Ru‐Wen Peng ₁ , Bo Xiong ₁ , Ren‐Hao Fan ₁ , Ya‐Jun Gao ₁ , Yongmin Liu _{2,

3} , Dong‐Xiang Qi ₁ , Mu Wang _{1,

4}

Affiliation

Broadband tuning of polarization states is pivotal yet challenging in modern photonics technologies, especially for miniaturized or integrated systems. Metasurfaces potentially provide an effective approach to resolve this challenge. However, once a metadevice is fabricated, its functionalities are determined, and it is hard to actively tune the polarization states. Here, the electrically tunable broadband polarization states by combining phase-change material (vanadium dioxide) and dispersion-free metasurface are demonstrated for the first time. The polarization states are modulated through the electrically driven, Joule-heat-induced phase transition of vanadium dioxide, where the output polarization state can be continuously tuned from horizontal one to vertical one, or from circular polarization to linear polarization. With accurate on-chip control of the phase transition, continuous and reversible modulation of polarization is verified in a scanning display. Moreover, a proof-of-concept demonstration for dynamically independent control of multiple polarization display is carried out. Different images are produced by applying electrical currents in N separate channels to generate a dynamic multiplexing polarization display with 2^N encoding states. Such an active metasurface can be readily integrated with electronics and has potential applications in display, encryption, camouflage, and information processing.

中文翻译：

基于焦耳热诱导二氧化钒相变的有源超表面电驱动可调谐宽带偏振态

偏振态的宽带调谐在现代光子学技术中至关重要，但具有挑战性，特别是对于小型化或集成系统。超表面可能提供一种有效的方法来解决这一挑战。然而，一旦制造出元器件，其功能就确定了，并且很难主动调整偏振态。在这里，首次展示了通过相变材料（二氧化钒）和无色散超表面相结合的电可调宽带偏振态。偏振态通过电驱动的、焦耳热诱导的二氧化钒相变进行调制，其中输出偏振态可以从水平偏振态连续调谐到垂直偏振态，或从圆偏振态到线性偏振态。通过对相变的精确片上控制，在扫描显示器中验证了偏振的连续和可逆调制。此外，还进行了多偏振显示动态独立控制的概念验证演示。通过施加电流产生不同的图像N 个单独的通道生成具有 2 ^{N 个}编码状态的动态多路复用偏振显示。这种主动超表面可以很容易地与电子设备集成，并在显示、加密、伪装和信息处理方面具有潜在的应用。

更新日期：2021-10-19

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