Joint Amplitude‐Phase Metasurface for Polarization‐Selective Dynamic Wavefront Manipulation and Broadband Absorption

Abstract

With modern science and technology developing towards large information capacity and high integration level, anisotropic metasurfaces have emerged as an advanced platform for integrating distinct functionalities and multitasking. Despite the significant progresses, most of the existing polarization‐controlled metasurfaces support phase‐only modulation for dual orthogonal polarization information channels. Here, a reconfigurable anisotropic metasurface of 576 independent meta‐atoms embedded with diodes and resistors is proposed to enable polarization‐selective amplitude‐phase modulation, which further integrates dynamic wavefront control and broadband energy absorption for two polarization channels with high isolation. As exemplary demonstrations, a series of programmable functionalities have been realized for one polarization channel, including dual‐beam scanning, quad‐beam radiation, and diffusive scattering for far‐field scattering manipulation, as well as reconfigurable focusing for near‐field redistribution. Meanwhile, robust broadband energy absorption has been maintained for the other polarization channel, irrespective of the programmable functionalities. Experiments in the microwave region are carried out to verify the powerful wavefront tailoring ability, and all the measured results are in good consistency with simulated analysis.

Fabrication of ZnS/g‐C3N4/Gypsum Plaster Nanocomposite Toward Refining Electromagnetic Pollution and Saving Energy

“…Nevertheless, it has been observed in dielectric microwave‐absorbing materials with unique structures and special morphologies that permeability can be created by charge circuits and currents, considered metamaterial and quasiantenna structures, deduced by Oersted's and Lenz's law. [ 16–18,20,24,50,60,78,95–99 ] Figure S2, Supporting Information, shows the eddy current ( C 0 ) curves of the samples. The more constant the C 0 implies, the more eddy current loss.…”

Versatile design of tunable Faraday rotator for terahertz band using graphene-InSb-graphene and 1D photonic crystal

“…Recent advancements in terahertz (THz) science and technology, encompassing the development of THz photoconductive antenna [1,2] and communication [3][4][5][6], are advancing at a rapid pace. The manipulation of polarization states proves valuable in diverse applications such as sensing [7], optical isolation [8], and polarization control [9]. When a plane wave traverses a transparent medium under the influence of a perpendicular static magnetic field (B), the polarization state of the incident wave experiences a rotation, an optical phenomenon designated as FR [8,10,11].…”

“…The manipulation of polarization states proves valuable in diverse applications such as sensing [7], optical isolation [8], and polarization control [9]. When a plane wave traverses a transparent medium under the influence of a perpendicular static magnetic field (B), the polarization state of the incident wave experiences a rotation, an optical phenomenon designated as FR [8,10,11]. This rotation arises due to the magneto-optic effect, where the magnetic field induces a differential phase shift between the left and right circularly polarized components of the wave [12].…”