Terahertz polarization beam splitter based on photonic crystal and multimode interference

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

References

[1] YangZ-g, LiuJ-s, WangK-j. Journal of Optoelectronics·Laser, 2013, 24: 1158

[2] YuanY, HeJ, LiuJ, YaoJ. Applied Optics, 2010, 49: 6092

[3] LuM, LiW, BrownE R. Optics Letters, 2011, 36: 1071

[4] ShuJ, QiuC, AstleyV, NickelD, MittlemanD M, XuQ. Optics Express, 2011, 19: 26666

[5] LiZ-y, YaoJ-q, XuD-g, BingP-b, ZhongK. Journal of Optoelectronics ·Laser, 2012, 23: 425

[6] LiJ-s, XuD-g, YaoJ-q. Applied Optics, 2010, 49: 4494

[7] ChenX, QiangZ, ZhaoD, WangY, LiH, QiuY, ZhouW. Optics Communications, 2011, 284: 490

[8] GuanX, WuH, ShiY, WosinskiL, DaiD. Optics Letters, 2013, 38: 3005

[9] SheJ, ForsbergE, AoX Y, HeS L. Journal of Optics A: Pure and Applied Optics, 2006, 8: 345

[10] KwongD, ZhangY, HosseiniA, LiuY, ChenR T. Electronics Letters, 2010, 46: 1281

[11] KimH-J, ParkI, OB-H, ParkS-G, LeeE-H, LeeS-G. Optics Express, 2004, 12: 5625

[12] ZhangY, LiZ, LiB. Optics Express, 2006, 14: 2679

[13] SoldanoL B, PenningsE C M. Journal of Lightwave Technology, 1995, 13: 615