[1] J. A. Armstrong, N. Bloembergen, J. Ducuing, and P. S. Pershan, Phys. Rev. 127, 1918 (1962).
[2] Y. Y. Zhu, S. N. Zhu, and N. B. Ming, Science 278, 843 (1997).
[3] G. D. Miller, R. G. Batchko, W. M. Tulloch, D. R. Weise, M. M. Fejer, and R. L. Byer, Opt. Lett. 22, 1834 (1997).
[4] V. Berger, Phys. Rev. Lett. 81, 4136 (1998).
[5] B. Q. Ma, T. Wang, P. Y. Ni, B. Y. Cheng, and D. Z. Zhang, Europhys. Lett. 68, 804 (2004).
[6] K. Liu, J. H. Shi, and X. F. Chen, Appl. Phys. Lett. 94, 101106 (2009).
[7] K. Kalinowski, Q. Kong, V. Roppo, A. Arie, Y. Sheng, and W. Krolikowski, Appl. Phys. Lett. 99, 181128 (2011).
[8] D. Yudistira, S. Benchabane, D. Janner, and V. Pruneri1, Appl. Phys. Lett. 95, 052901 (2009).
[9] J. Burghoff, C. Grebing, S. Nolte, and A. T¨unnermann, Appl. Phys. Lett. 89, 081108 (2006).
[10] M. Oxborrow and C. Henley, Phys. Rev. B 48, 6966 (1993).
