Broadband polarization beam splitter based on subwavelength grating in Terahertz

Yelan Zhang; Yuyang Cheng; Kun Zhang; Caiyu Li; Weijin Kong

doi:10.1117/12.2535633

8 July 2019 Broadband polarization beam splitter based on subwavelength grating in Terahertz

Yelan Zhang, Yuyang Cheng, Kun Zhang, Caiyu Li, Weijin Kong

Proceedings Volume 11064, Tenth International Conference on Thin Film Physics and Applications (TFPA 2019); 110640J (2019) https://doi.org/10.1117/12.2535633
Event: Pacific Rim Laser Damage 2019 and Thin Film Physics and Applications 2019, 2019, Qingdao, China

Abstract

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.

Citation Download Citation

Yelan Zhang, Yuyang Cheng, Kun Zhang, Caiyu Li, and Weijin Kong "Broadband polarization beam splitter based on subwavelength grating in Terahertz", Proc. SPIE 11064, Tenth International Conference on Thin Film Physics and Applications (TFPA 2019), 110640J (8 July 2019); https://doi.org/10.1117/12.2535633

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