[1] Z. Qiang, W. Zhou, and R. A. Soref, Opt. Express 15, 1823 (2007).

[2] C. Manolatou, M. J. Khan, S. Fan, P. R. Villeneuve, H. A. Haus, and J. D. Joannopoulos, IEEE J. Quantum Electron. 35, 1322 (1999).

[3] Y. Naka and H. Ikuno, in Proceedings of 2001 URSI International Symposium on Electromagnetic Theory (Victoria, Canada, 2001) p529.

[4] V. Dinesh Kumar, T. Srinivas, and A. Selvarajan, Photonics and Nanostructures 2, 199 (2004).

[5] M. Notomi, A. Shinya, S. Mitsugi, E. Kuramochi, and H. Y. Ryu, Opt. Express 12, 1551 (2004).

[6] T. Barwicz, M. Popovic, P. Rakich, M. Watts, H. Haus, E. Ippen, and H. Smith, Opt. Express 12, 1437 (2004).

[7] J. Romero-Vivas, D. N. Chigrin, A. V. Lavrinenko, and C. M. Sotomayor Torres, Opt. Express 13, 826 (2005).