[1] H. He, M. Friese, N. R. Heckenberg, H. Rubinsztein-Dunlop. Phys. Rev. Lett., 75, 826(1995).
[2] M. Gao, C. Gao, Z. Lin. Chin. Opt. Lett., 5, 89(2007).
[3] D. Grier. Nature, 424, 810(2003).
[7] M. Zhang, P. Jia, Y. Li, T. Lei, Z. Li, X. Yuan. Chin. Opt. Lett., 13, 100502(2015).
[9] P. Gregg, P. Kristensen, S. Golowich, J. Olsen, P. Steinvurzel, S. Ramachandran. Proceedings of CLEO, CTu2K.2(2013).
[10] C. Brunet, P. Vaity, Y. Messaddeq, S. LaRochelle, L. A. Rusch. Opt. Express, 22, 26117(2014).
[11] S. Li, J. Wang. IEEE Photon. J., 5, 7101007(2013).
[13] M. Zhu, W. Zhang, L. Xi, X. Tang, X. Zhang. Opt. Fiber Technol., 25, 58(2015).
[14] P. Gregg, P. Kristensen, S. Ramachandran. Optica, 2, 267(2015).
[15] S. Li, J. Wang. Sci. Rep., 4, 3853(2014).
[16] H. Yan, S. Li, F. Bian, X. Zheng, H. Zhang, B. Zhou. Proceedings of OECC: 2016 21st, 1(2016).
[17] J. W. Fleming. Appl. Opt., 23, 4486(1984).
[18] Y. Tsuchida, K. Saitoh, M. Koshiba. Opt. Express, 13, 4770(2005).
[19] L. Wang, S. Larochelle. Opt. Lett., 40, 5846(2015).
[20] A. Snyder, J. Love. Optical Waveguide Theory(1983).
[21] N. Bozinovic, S. Golowich, P. Kristensen, S. Ramachandran. Opt. Lett., 37, 2451(2012).
[22] N. Imoto, N. Yoshizawa, J. Sakai, H. Tsuchiya. IEEE J. Quantum Electron., 16, 1267(1980).
[23] R. Black, L. Gagnon. Optical Waveguide Modes: Polarization, Coupling and Symmetry(2009).
[24] D. McGloin, N. Simpson, M. Padgett. Appl. Opt., 37, 469(1998).
[25] H. Yan, S. Li, B. Chen, L. Yang, X. Zheng, H. Zhang, B. Zhou. Proceedings of IPC, WF3.4(2016).
[26] Q. Wang, G. Rajan, P. Wang, G. Farrell. Opt. Express, 15, 4909(2007).
[27] S. Yao, C. Asawa, G. Lipscomb. Appl. Opt., 21, 3059(1982).