[1] W. Cao, J. Ma, and C. Zhou, Chin. Opt. Lett. 10, 112301 (2012).
[2] H. Dammann and E. Klotz, Opt. Acta 24, 505 (1977).
[3] J. G. Smith, L. Ramos-Izquierdo, A. Stockham, and S. Scott, Proc. SPIE 6223, 622304 (2006).
[4] D. Nieto, M. T. Flores-Arias, G. M. O’Connor, and C. Gomez-Reino, Appl. Opt. 49, 4979 (2010).
[5] C. Rensch, S. Hell, M. V. Schickfus, and S. Hunklinger, Appl. Opt. 28, 3754 (1989).
[6] J. I. Mitchell, S. J. Park, A. C. Watson, P. Srisungsit-thisunti, C. Tansarawiput, M. Qi, E. A. Stach, C. Yang, and X. Xu, Opt. Eng. 50, 104301 (2011).
[7] B. Yu, J. Wei, C. Zhou, H. Cao, and W. Sun, Chin. Opt. Lett. 11, 080501 (2013).
[8] S. Zhao and P. S. Chung, Opt. Lett. 31, 16 (2006).
[9] C. Zhou and L. Liu, Appl. Opt. 34, 5961 (1995).
[10] R. L. Morrison, J. Opt. Soc. Am. A 9, 464 (1992).
[11] I. Moreno, J. A. Davis, D. M. Cottrell, N. Zhang, and X.-C. Yuan, Opt. 34, 10 (2010).
[12] C. Iliescu, B. Chen, and J. Miao, Sens. Actuator A Phys. 143, 154 (2008).
