Terahertz polarization beam splitter based on photonic crystal and multimode interference

Han Liu; Jiu-sheng Li

doi:10.1007/s11801-014-4119-2

Optoelectronics Letters ›› , Vol. 10 ›› Issue (5) : 325-328. DOI: 10.1007/s11801-014-4119-2

Article

Terahertz polarization beam splitter based on photonic crystal and multimode interference

Han Liu¹ ,
Jiu-sheng Li¹^,^b

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Abstract

We design a compact terahertz (THz) polarization beam splitter. Both plane wave expansion method and finite-difference time-domain method are used to calculate and analyze the characteristics of the proposed device. The designed polarization beam splitter can split TE-polarized and TM-polarized THz waves into different propagation directions. The simulation results show that the extinction ratios are larger than 18.36 dB for TE polarization and 13.35 dB for TM polarization in the frequency range from 1.86 THz to 1.91 THz, respectively. The designed polarization beam splitter has the advantages of small size and compact structure with a total size of 4.825 mm×0.400 mm.

Keywords

Photonic Crystal / Extinction Ratio / Polarization Beam Splitter / Photonic Crystal Structure / Output Waveguide

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Han Liu, Jiu-sheng Li. Terahertz polarization beam splitter based on photonic crystal and multimode interference. Optoelectronics Letters, , 10(5): 325‒328 https://doi.org/10.1007/s11801-014-4119-2

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This work has been supported by the National Natural Science Foundation of China (Nos.61379024 and 61131005), and the Zhejiang Provincial Outstanding Youth Foundation (No.LR12F05001).