[1] [1] Z. Shen, Y. Shi, G. Yan, L. Yuan, J. Lu, and X. Ni, Inf. Laser Eng. (in Chinese) 36, 239 (2007).

[2] [2] M. Qian, Tech. Acoust. (in Chinese) 21, 19 (2002).

[3] [3] Q. Han, M. Qian, and C. Zhu, Acta Phys. Sin. (in Chinese) 56, 313 (2007).

[4] [4] J. Jia, Z. Shen, L. Wang, and L. Yuan, Chin. Opt. Lett. 9, 022501 (2011).

[5] [5] A. K. Kromine, P. A. Fomitchov, S. Krishnaswamy, and J. D. Achenbach, Proc. SPIE 4076, 252 (2000).

[6] [6] O. Buck, W. Morris, and J. Richardson, Appl. Phys. Lett. 33, 371 (1978).

[7] [7] H. Xiao and P. B. Nagy, J. Appl. Phys. 83, 7453 (1998).

[8] [8] Z. Yan and P. B. Nagy, NDT & E International 33, 213 (2000).

[9] [9] N. Chigarev, J. Zakrzewski, V. Tournat, and V. Gusev, J. Appl. Phys. 106, 036101 (2009).

[10] [10] V. Gusev and N. Chigarev, J. Appl. Phys. 107, 124905 (2010).

[11] [11] C. Y. Ni, N. Chigarev, V. Tournat, N. Delorme, Z. H. Shen, and V. E. Gusev, J. Acoust. Soc. Am. 131, EL250 (2012).

[12] [12] L. Dong, J. Li, C. Ni, Z. Shen, X. Ni, J. Chen, N. Chigarev, V. Tournat, and V. Gusev, Chinese J. Lasers (in Chinese) 38, 1103001 (2011).

[13] [13] J. Liu, J. Lu, X. Ni, G. Dai, and L. Zhang, Chin. Opt. Lett. 8, 1000 (2010).