[1] [1] AMING A, RAHMAN B M A. Design and characterization low-loss modes in dielectric-coated hollow-core waveguides at THz frequency[J]. Journal of Lightwave Technology, 2018, 36(13):2716-2722.

[2] [2] WANG C, WU G Zh, ZHOU P, et al. Mode properties of hybrid plasmonic waveguide with an metal nano-rib[J]. Acta Photonica Sinica, 2014, 43(9): 0916001(in Chinese).

[3] [3] HSU J M. Systematic design of highly birefringent photonic crystal fibers [J]. Applied Physics, 2017, B123(3):73.

[4] [4] ATAKARAMIANS S, SHAHRAAM A V, EBENDORFF-HEIDEPRIEM H, et al. THz porous fibers: Design, fabrication and experimental characterization[J]. Optics Express, 2009, 17(16):14053-14062.

[5] [5] HASANUZZAMAN G K M, RANA S, HABIB M S. A novel low loss, highly birefringent photonic crystal fiber in THz regime[J]. IEEE Photonics Technology Letters, 2016, 28(8):899-902.

[6] [6] KAWSAR A, SAWRAD C, KUMAR P B, et al. Ultrahigh birefringence, ultralow material loss porous core sigle-mode fiber for terahertz wave guidance[J]. Applied Optics, 2017, 56(12):3477-3483.

[7] [7] ZHANG F, WU G Zh, WANG Ch Ch. Influence of surface curvature on mode and sensing characteristics of quartz capillary micro-bottles[J]. Laser Technology, 2018, 42(6): 840-844(in Chinese).

[8] [8] CHU Zh Zh, YOU L B, WANG Q Sh, et al. Progress in fabrication of polymer optical fiber gratings[J]. Laser Technology, 2018, 42(1): 11-18(in Chinese).

[9] [9] ORTIGOSABLANCH A, KNIGHT J C, WADSWORTH W J, et al. Highly birefringent photonic crystal fibers[J]. Optics Letters, 2000, 25(18):1325-1327.

[10] [10] WU Zh,SHI Zh,XIA H, et al. Design of highly birefringent and low-loss oligoporous-core THz photonic crystal fiber with single circular air-hole unit[J]. IEEE Photonics Journal, 2016, 8(6):1-11.

[11] [11] CHEN N N, LIANG J, REN L, et al. High-birefringence, low-loss porous fiber for single-mode terahertz-wave guidance[J]. Applied Optics, 2013, 52(21):5297-5302.

[12] [12] HASANUZZAMAN G K M, HABIB M S, ABDUR RAZZAK S M, et al. Low loss single mode porous-core kagome photonic crystal fiber for THz wave guidance[J]. Journal of Lightwave Technology, 2015, 33 (19): 4027-4031.

[13] [13] CHO M, KIM J, PARK H, et al. Highly birefringent terahertz polarization maintaining plastic photonic crystal fibers[J]. Optics Express, 2008, 16(1):7-12.

[14] [14] ISLAM R, HABIB M S, HASANUZZAMAN G K M, et al. Novel porous fiber based on dualasymmetry for low-loss polarization maintaining THz wave guidance[J]. Optics Letters, 2016,41(3):440-443.

[15] [15] REN G. Low-loss air-core polarization maintaining terahertz fiber [J]. Optics Express, 2008, 16(18): 13593-13598.

[16] [16] KIM S E, KIM B H, LEE C G, et al. Elliptical defected core photonic crystal fiber with high birefringence and negative flattened dispersion. [J]. Optics Express, 2012, 20(2):1385-1391.

[17] [17] LIU M, YUAN H T, SHUM P, et al. Simultaneous achievement of highly birefringent and nonlinear photonic crystal fibers with an elliptical tellurite core[J]. Applied Optics, 2018, 57(22):6383-6387.

[18] [18] ISLAM M S, FAISAL M, RAZZAK S M A. Extremely low loss porous-core photonic crystal fiber with ul tra-flat dispersion in terahertz regime[J]. Journal of the Optical Society of America, 2017, B34(8):1747-1754.

[19] [19] YANG T Y, DING C, ZIOLKOWSKI R W, et al. A scalable THz photonic crystal fiber with partially-slotted core that exhibits improved birefringence and reduced loss[J]. Journal of Lightwave Technology, 2018, 36(16):3408-3417.

[20] [20] HABIB M A, ANOWER M S. Low loss highly birefringent porous core fiber for single mode terahertz wave guidance[J]. Current Optics and Photonics, 2018,2(3): 215-220.

[21] [21] ATAKARAMIANS S, SHAHRAAM A V, EBENDORFF-HEIDEPRIEM H, et al. THz porous fibers: Design, fabrication and experimental characterization[J]. Optics Express, 2009, 17(16):14053-15062.

[22] [22] KAIJAGE S F, OUYANG Zh B, JIN X. Porous-core photonic crystal fiber for low loss terahertz wave guiding[J]. IEEE Photonics Technology Letters, 2013, 25(15):1454-1457.