Generating dual-polarization beams carrying dual orbital angular momentum modes based on anisotropic holographic metasurfaces

Abstract

In 2007, the Swedish physicist Thidé was the first to introduce the OAM concept from optics into the radio frequency domain by using a uniform circular array (UCA) and demonstrating numerical simulation results, which became the foundation for further investigations into the concept of OAM in the wireless communication domain [4]. Subsequently, in 2011, Thidé experimentally demonstrated that two different information

Optimized chemical potential graphene-based coding metasurface approach for dynamic manipulation of terahertz wavefront

“…The electromagnetic OAM, which carries the exp(jmϕ) phase term, has the vast potential application in the electromagnetic multiplexing system due to the orthogonality of the OAM modes. Over a communication link based on vortex beams, the generation of OAM vortex waves has been presented in several recent pieces of research and has attracted considerable interest due to its specific characteristics and applications in optics, microwave and THz band [56][57][58].…”

Multiplexing Tensor Holographic Metasurface with Surface Impedance Superposition for Manipulating Multibeams with Multimodes

“…[22][23][24] In addition to multibeam generations, scalar holographic metasurface is potential to manipulate these multiple beams with multiple modes. [25][26][27][28][29][30][31][32][33][34][35][36] For example, dual-polarized beams are realized with two orthogonally excited feeds on the holographic metasurface, [26] and it is then extended to dual-frequency radiations. [27] The multibeams can be electrically switched using PIN diode, [28] or can be reconfigurable using matrix approximation.…”

“…On the other hand, tensor holographic metasurface is more suitable for certain applications, as it is flexible to manipulate the amplitude, phase, and polarization of multibeams. [31][32][33][34][35] For example, circularly polarized multiple beams are generated by a single or multisource, [31,32] spatial modulation of holographic Multimode multibeams are widely investigated, but are mostly generated by 3D bulky configuration or partitioned aperture for each beam. This paper proposes and analyzes a method to generate multimode multibeams using a planar single-layer metasurface with shared aperture.…”

“…[1][2][3][4][5][6][7][8][9][10][11][12] Taking Bessel beam as an example, it is widely investigated by using axicon, [2,3] dielectric lens, [4] leaky radial waveguide, [5] spoof surface plasmon polariton, [6] and image is achieved by self-rotation or projection in free space, [33] and linearly polarized dual vortex beams are radiated from a single feed. [34,35] However, the state-of-the-art research on tensor holographic metasurface is mainly limited to single frequency band. As seldomly published, a dual-band radiation is realized, [36] but the designed metasurface is partitioned into two subarrays, which only contribute to the corresponding beams, i.e., the metasurface is not shared or multiplexed, and therefore is not effectively used.…”

Vanadium dioxide embedded frequency reconfigurable metasurface for multi-dimensional multiplexing of terahertz communication

“…Therefore, generating OAM beams based on metasurfaces has been widely investigated [17][18][19][20][21][22][23][24]. Current methods for OAM multiplexing by metasurfaces suffer from the complex structure [25,26], extremely limited multiplexing channels [27,28], same data on multiple OAM beams [29,30], or limited channel multiplexing on the OAM topology dimension [31,32]. Several researchers have recently realized combined dimensional multiplexing on polarization and OAM topology [33,34].…”