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Polarization‐Engineered Noninterleaved Metasurface for Integer and Fractional Orbital Angular Momentum Multiplexing
Laser & Photonics Reviews ( IF 9.8 ) Pub Date : 2020-11-22 , DOI: 10.1002/lpor.202000351 Kuang Zhang 1 , Yueyi Yuan 1 , Xumin Ding 2 , Haoyu Li 2 , Badreddine Ratni 3 , Qun Wu 1 , Jian Liu 2 , Shah Nawaz Burokur 3 , Jiubin Tan 2
Laser & Photonics Reviews ( IF 9.8 ) Pub Date : 2020-11-22 , DOI: 10.1002/lpor.202000351 Kuang Zhang 1 , Yueyi Yuan 1 , Xumin Ding 2 , Haoyu Li 2 , Badreddine Ratni 3 , Qun Wu 1 , Jian Liu 2 , Shah Nawaz Burokur 3 , Jiubin Tan 2
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Vortex beam carrying orbital angular momentum (OAM) has been widely explored in optical and microwave regions attributed to its potential characteristics in communication systems. For circular polarization incidence, Pancharatnam–Berry (PB) phase is a direct resource to generate phase gradient along the azimuthal direction required by specific OAM mode. The main drawback of PB phase is that it only affects cross‐polarized fields and keeps the copolarized part unmodulated. Here, a paradigm‐shift perspective of noninterleaved metasurfaces is proposed, which can simultaneously generate separate multiple integer and fractional OAM modes occupying both copolarized and cross‐polarized output channels. The scheme is validated by a series of experimental demonstrations in the microwave regime. By adjusting the polarization states of both input and receiving ends, different integer and fractional OAM modes are demonstrated in the full transmission channels. The results offer a unique recipe to enhance information capacity of metasurfaces and trigger versatile electromagnetic (EM) wave function integrations for advanced compact systems. A variety of applications can be readily expected in spin‐selective optics, spin‐Hall metadevices, and multitask metasurfaces operating in both reflection and transmission modes.
中文翻译：
用于整数和分数轨道角动量复用的极化工程非交错超颖表面
归因于其在通信系统中的潜在特性，在光学和微波区域中广泛研究了携带轨道角动量（OAM）的涡旋光束。对于圆极化入射，Pancharatnam–Berry（PB）相位是沿特定OAM模式所需的沿方位角方向生成相位梯度的直接资源。PB相的主要缺点是它仅影响交叉极化场，并使同极化部分保持未调制状态。在此，提出了一种非交错超颖表面的范式移位透视图，它可以同时生成分别占据同极化和交叉极化输出通道的多个整数和分数OAM模式。该方案已通过一系列在微波条件下的实验演示得到了验证。通过调整输入端和接收端的极化状态，可以在完整的传输通道中演示不同的整数和分数OAM模式。结果提供了独特的配方，可增强超表面的信息容量并触发用于高级紧凑型系统的多功能电磁（EM）波功能集成。自旋选择光学器件，自旋霍尔元设备和以反射和透射模式工作的多任务超表面都可以很容易地期待各种应用。
更新日期：2021-01-08
中文翻译：
用于整数和分数轨道角动量复用的极化工程非交错超颖表面
归因于其在通信系统中的潜在特性，在光学和微波区域中广泛研究了携带轨道角动量（OAM）的涡旋光束。对于圆极化入射，Pancharatnam–Berry（PB）相位是沿特定OAM模式所需的沿方位角方向生成相位梯度的直接资源。PB相的主要缺点是它仅影响交叉极化场，并使同极化部分保持未调制状态。在此，提出了一种非交错超颖表面的范式移位透视图，它可以同时生成分别占据同极化和交叉极化输出通道的多个整数和分数OAM模式。该方案已通过一系列在微波条件下的实验演示得到了验证。通过调整输入端和接收端的极化状态，可以在完整的传输通道中演示不同的整数和分数OAM模式。结果提供了独特的配方，可增强超表面的信息容量并触发用于高级紧凑型系统的多功能电磁（EM）波功能集成。自旋选择光学器件，自旋霍尔元设备和以反射和透射模式工作的多任务超表面都可以很容易地期待各种应用。
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