Strontium Titanate-Enabled Coding Metasurface for Dynamic Manipulation of Terahertz Beams
A coding metasurface incorporating the temperature-controlled material strontium titanate(STO)is presented in the terahertz band.The temperature of STO reaches 300K,the coding metasurface constitutes 1-Bit at 0.94 THz.Adjusting the temperature to 500 K,the coding metasurface realizes 1-Bit at the 1.08 THz.The manipulation of terahertz waves by the coding metasurface is investigated,including the beam manipulation of terahertz waves and the radar scattering cross section(RCS)reduction.By comparing the 3D far-field scattering maps of coding metasurface combined with STO and pure metal,the phase-change material STO can significantly enhance the sensitivity of coding metasurface to terahertz waves,better to manipulate ter-ahertz waves.The research results show that the coding metasurface based on STO provides a new way to control the THz wave,and has a huge application potential in 6-band communications and security.
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维普
