Independent Amplitude Control of Arbitrary Orthogonal States of Polarization via Dielectric Metasurfaces.
Independent Amplitude Control of Arbitrary Orthogonal States of Polarization via Dielectric Metasurfaces.
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DOI：
10.1103/physrevlett.125.267402
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发表时间：
2020-12-31
影响因子：
8.6
通讯作者：
Xu T
中科院分区：
文献类型：
--
作者：
Fan Q;Liu M;Zhang C;Zhu W;Wang Y;Lin P;Yan F;Chen L;Lezec HJ;Lu Y;Agrawal A;Xu T
由于光学超表面能够以亚波长分辨率操纵多通道独立波前，因此使用超表面进行精密偏振控制引起了相当大的关注。在这里，我们提出了一类新的超表面偏振光学，它可以在任何一对正交偏振态上强加两个任意和独立的振幅轮廓。该实现方法通过构建由纳米级双折射波片阵列组成的超表面来实现偏振相关干涉机制。基于这一原理，实验证明了结构光的手性灰度超表面和手性阴影渲染。这些结果说明了一种将振幅剖面和正交偏振态联系起来的一般方法，并扩展了超表面偏振整形光学的范围。
Exquisite polarization control using optical metasurfaces has attracted considerable attention thanks to their ability to manipulate multichannel independent wavefronts with subwavelength resolution. Here we present a new class of metasurface polarization optics, which enables imposition of two arbitrary and independent amplitude profiles on any pair of orthogonal states of polarization. The implementation method involves a polarization-dependent interference mechanism achieved by constructing a metasurface composed of an array of nanoscale birefringent waveplates. Based on this principle, we experimentally demonstrate chiral grayscale metasurface and chiral shadow rendering of structured light. These results illustrate a general approach interlinking amplitude profiles and orthogonal states of polarization and expands the scope of metasurface polarization shaping optics.