A Novel THz Half-Wave Polarization Converter for Cross-Polarization Conversions of Both Linear and Circular Polarizations and Polarization Conversion Ratio Regulating by Graphene

作者：Peng, Lin^*; Li, Xiao-Feng; Jiang, Xing; Li, Si-Min

来源：Journal of Lightwave Technology, 2018, 36(19): 4250-4258.

DOI：10.1109/JLT.2018.2836904

• CP conversion
• graphene
• LP conversion
• PCR regulation
• polarization converter

Polarization converter is firstly proposed with the functions of simultaneously converting a linear polarization (LP) and a circular polarization (CP) to its corresponding cross polarizations, and polarization conversion ratio (PCR) of the converter with graphene strips is also controllable in this paper. A reflection-type converter is designed based on a metasurface in the terahertz region. It consists of periodic unit cells with strip-loaded half elliptical rings, a dielectric spacer layer, and a gold layer. The converter with PCR regulating also includes graphene strips on the gold layer. Both the LP and CP incidences can be converted into their cross-polarized ones with good PCR performances in a 2-THz band (2.1-2.9 THz, 32%). The graphene strips on the gold layer that disturbs the gold layer currents can regulate the PCR, typically from 2% to 98% f

• 出版日期2018-10-1
• 单位桂林电子科技大学; 广西大学