Achieving independent multitasked wavefront control by using an ultrathin plate is a challenge to increase information capacity in integration optics and radar applications. Transmission-reflection-integrated metasurface provides an efficient recipe primarily for multifunctional meta-device, however it is challenging to synergize both linear polarization (LP) and circular polarization (CP) using a single meta-plate. Here, a multichannel full-space coding metasurface composed of interleaved shared-aperture meta-atom is proposed to achieve large information capacity by capsulating judiciously engineered high efficiency triple sub-elements (modes) in four-layer scheme. By rotating dual-gap split ring resonator and varying size of “L” type structure insulating by a metallic ring with electrostatic-analogue shielding effect, both Pancharatnam–Berry (PB) and dynamic phases are independently realized under CP and LP waves, respectively. Such an extraordinary insulating strategy completely suppresses crosstalk among three modes and unprecedentedly increases the capability in yielding kaleidoscopic wavefront control. To verify the significance, a proof-of-concept metadevice is devised and experimentally demonstrated with tri-channel wavefront manipulations, exhibiting reflective dual-vortex beam and Bessel beam for forward and backward CP wave, respectively at high frequency, while transmissive polarization beam splitting for 45°-LP wave at low frequency. Our finding in polarization-direction multiplexing is expected to generate great interest in electromagnetic integration with emerging degree of freedoms.

中文翻译：

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具有线圆偏振波前操纵的多通道全空间编码超表面


使用超薄板实现独立的多任务波前控制是提高集成光学和雷达应用中信息容量的挑战。透射反射集成超表面主要为多功能超设备提供了一种有效的方法，但是使用单个超板协同线性偏振（LP）和圆偏振（CP）具有挑战性。在这里，提出了一种由交错共享孔径元原子组成的多通道全空间编码超表面，通过在四层方案中封装精心设计的高效三重子元素（模式）来实现大信息容量。通过旋转双间隙开口环谐振器和通过具有静电模拟屏蔽效应的金属环绝缘的不同尺寸的“L”型结构，Pancharatnam-Berry（PB）和动态相位分别在CP和LP波下独立实现。这种非凡的绝缘策略完全抑制了三种模式之间的串扰，前所未有地提高了万花筒波前控制的能力。为了验证其重要性，设计了一种概念验证元设备，并通过三通道波前操作进行实验演示，在高频下分别展示用于前向和后向 CP 波的反射式双涡旋光束和贝塞尔光束，同时透射偏振光束分裂适用于低频 45°-LP 波。我们在偏振方向复用方面的发现预计将引起人们对新兴自由度电磁集成的极大兴趣。