1. J. Chilla, S. Butterworth, A. Zeitschel, J. Charles, A. Caprara, M. Reed, and L. Spinelli, in Nanobiophotonics and Biomedical Applications, Proc. SPIE 5332, 143 (2004).
2. F. Q. Jia, Laser Phys. 20, 1559 (2010).
3. N. Pavel, T. Taira, K. Mizuuchi, A. Morikawa, T. Sugita, and K. Yamsmoto, in Advanced Solid-State Photonics, Technical Digest (Opt. Soc. Amer., 2005), paper MB27.
4. E. Herault, F. Balembois, and P. Georges, in Advanced Solid-State Photonics (TOPS), Ed. by C. Denman and I. Sorokina, Vol. 98 of OSA Trends in Optics and Photonics (Opt. Soc. Amer., 2005), paper 500.
5. Y. F. Lü, G. C. Sun, X. H. Fu, Z. T. Liu, and J. F. Chen, Laser Phys. Lett. 7, 560 (2010).