Han Liu,Jiu-sheng Li.Terahertz polarization beam splitter based on photonic crystal and multimode interference[J].Optoelectronics Letters,2014,10(5):325-328 Terahertz polarization beam splitter based on photonic crystal and multimode interference Author Name Affiliation E-mail Han Liu  Centre for Terahertz Research, China Jiliang University, Hangzhou, 310018, China    Jiu-sheng Li  Centre for Terahertz Research, China Jiliang University, Hangzhou, 310018, China  lijsh2008@126.com  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. Hits: 3608 Download times: 0 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）. View Full Text    Download reader