Yelan Zhang, Yuyang Cheng, Kun Zhang, Caiyu Li, Weijin Kong
https://www.spiedigitallibrary.org/conference-proceedings-of-spie/11064/110640J/Broadband-polarization-beam-splitter-based-on-subwavelength-grating-in-Terahertz/10.1117/12.2535633.short?SSO=1
We design a broadband polarization beam
splitter (PBS) operating in the terahertz (THz) communication band
0.1THz-1.2THz. The transmittance of the TM mode is larger than 95%, in the
meanwhile, the extinction ratio can even reach 49dB. Considering the
unavoidable deformation in grating fabrication, we also check the performance
of the PBS based on trapeziform grating. Results show that increasing the duty
cycle while the slope angle diminishing can effectively increase the TM mode
transmittance and the extinction ratio, which can compensate the affection
induced by the geometric deformation. This design may achieve some potential
applications in THz manipulation system.
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