基于狄拉克半金属的可调谐反射自旋解耦编码超表面

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Abstract： Multiple functional metasurfaces with high information capacity have attracted considerable attention from researchers.This study proposes a 2-bit tunable spin-decoupled coded metasurface designed for the terahertz b， which utilizes the tunable properties Dirac semimetals （DSM） to create a novel multilayer structure.By incorporating both geometric propagating phases into the metasurface design， we can effectively control the electromagnetic wave. When the Fermi level （EF） the DSM is set at 6 meV， the electromagnetic wave is manipulated by the gold patch embedded in the DSM film， operating at a frequency 1.3THz . When the EF the DSM is set at 80meV ，the electromagnetic wave is manipulated by the DSM patch， operating at a frequency 1.4THz .Both modes enable independent control beam splitting under left-rotating circularly polarized （LCP） right-rotating circularly polarized （RCP） wave excitation， resulting in the generation vortex beams with distinct orbital angular momentum （OAM） modes.The findings this study hold significant potential for enhancing information capacity polarization multiplexing techniques in wireless communications.

Words： coding metasurface; dirac semimetal; spin decoupling; circular polarization; tunable

摘要：具有较高信息容量的多功能超表面受到研究者的广泛关注。（剩余27992字）