[1] [1] S. B. Mansoor, A. S. Ali, T. H. Wei et al.. Sensitive measurement of optical nonlinearities using a single beam. IEEE J. Quantum Electron., 1990, 26(4):760～769

[2] [2] A. Martucci, J. Fick, J. Schell et al.. Microstructural and nonlinear optical properties of silica-titania sol-gel film doped with PbS quantum dots. J. Appl. Phys., 1999, 86(1):79～8 7

[4] [4] R. Quintero-Torres, M. Thakur. Measurement of the nonlinear refractive index of polydiacetylene using Michelson interferometry and z-scan. J. Appl. Phys., 1999, 85(1):401～403

[5] [5] F. Kajzar, J. Messier. Cubic effects in polydiacetylene solution and thin films. In Nonlinear Optical Properties of Organic Molecules and Crystals, eds. D. S. Chemla, J. Zyss, Vol.2, Orlando: Academic Press, 1987. 51～53

[6] [6] Y. R. Shen, S. J. Gu. The principles of nonlinear optics. Beijing: Science Press, 1987. 354～355 (in Chinese)

[7] [7] O. Werner, B. Fischer, A. Lewis. Strong self-defocusing effect and four-wave mixing in bacteriorhodopsin films. Opt. Lett., 1992, 17(4):241～243

[8] [8] J. G. Tian, C. Zhang, G. Zhang et al.. Position dispersion a nd optical limiting resulting from thermally induced nonlinearities in Chinese t ea liquid. Appl. Opt., 1993, 32(33):6628～66 32

[9] [9] D. I. Kovsh, S. Yang, D. J. Hagan et al.. Nonlinear optical beam propagation for optical limiting. Appl. Opt., 1999, 38 (24):5168～5180

[10] [10] H. K. Chong, L. L. Yeung, G. K. Seong. Analysis of asymmetric Z-scan measurement for Large optical nonlinearities in an amorphous As2S3 thin film. J. Opt. Soc. Am. B, 1999, 16(4):600～604