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A Fully Phase‐Modulated Metasurface as An Energy‐Controllable Circular Polarization Router
Advanced Science ( IF 14.3 ) Pub Date : 2020-07-16 , DOI: 10.1002/advs.202001437 Yueyi Yuan 1 , Shang Sun 2 , Yang Chen 2 , Kuang Zhang 1 , Xumin Ding 1, 3 , Badreddine Ratni 4 , Qun Wu 1 , Shah Nawaz Burokur 4 , Cheng-Wei Qiu 2
Advanced Science ( IF 14.3 ) Pub Date : 2020-07-16 , DOI: 10.1002/advs.202001437 Yueyi Yuan 1 , Shang Sun 2 , Yang Chen 2 , Kuang Zhang 1 , Xumin Ding 1, 3 , Badreddine Ratni 4 , Qun Wu 1 , Shah Nawaz Burokur 4 , Cheng-Wei Qiu 2
Affiliation
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Geometric metasurfaces primarily follow the physical mechanism of Pancharatnam–Berry (PB) phases, empowering wavefront control of cross‐polarized reflective/transmissive light components. However, inherently accompanying the cross‐polarized components, the copolarized output components have not been attempted in parallel in existing works. Here, a general method is proposed to construct phase‐modulated metasurfaces for implementing functionalities separately in co‐ and cross‐polarized output fields under circularly polarized (CP) incidence, which is impossible to achieve with solely a geometric phase. By introducing a propagation phase as an additional degree of freedom, the electromagnetic (EM) energy carried by co‐ and cross‐polarized transmitted fields can be fully phase‐modulated with independent wavefronts. Under one CP incidence, a metasurface for separate functionalities with controllable energy repartition is verified by simulations and proof‐of‐principle microwave experiments. A variety of applications can be readily expected in spin‐selective optics, spin‐Hall metasurfaces, and multitasked metasurfaces operating in both reflective and transmissive modes.
中文翻译：
作为能量可控圆偏振路由器的完全相位调制超表面
几何超表面主要遵循 Pancharatnam-Berry (PB) 相的物理机制，支持交叉偏振反射/透射光分量的波前控制。然而，由于本质上伴随着交叉极化组件，共极化输出组件在现有工作中尚未尝试并行。在这里，提出了一种构建相位调制超表面的通用方法，用于在圆偏振（CP）入射下在同偏振和交叉偏振输出场中分别实现功能，这是仅使用几何相位无法实现的。通过引入传播相位作为附加自由度，同偏振和交叉偏振传输场携带的电磁 (EM) 能量可以通过独立波前进行完全相位调制。在一次 CP 入射下，通过模拟和原理验证微波实验验证了具有可控能量重新分配的独立功能的超表面。在自旋选择性光学、自旋霍尔超表面以及在反射和透射模式下工作的多任务超表面中，可以很容易地预期各种应用。
更新日期：2020-09-23
中文翻译：
作为能量可控圆偏振路由器的完全相位调制超表面
几何超表面主要遵循 Pancharatnam-Berry (PB) 相的物理机制，支持交叉偏振反射/透射光分量的波前控制。然而，由于本质上伴随着交叉极化组件，共极化输出组件在现有工作中尚未尝试并行。在这里，提出了一种构建相位调制超表面的通用方法，用于在圆偏振（CP）入射下在同偏振和交叉偏振输出场中分别实现功能，这是仅使用几何相位无法实现的。通过引入传播相位作为附加自由度，同偏振和交叉偏振传输场携带的电磁 (EM) 能量可以通过独立波前进行完全相位调制。在一次 CP 入射下，通过模拟和原理验证微波实验验证了具有可控能量重新分配的独立功能的超表面。在自旋选择性光学、自旋霍尔超表面以及在反射和透射模式下工作的多任务超表面中，可以很容易地预期各种应用。
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