中国物理B ›› 2008, Vol. 17 ›› Issue (6): 2156-2159.doi: 10.1088/1674-1056/17/6/036
林殿阳1, 吕志伟1, 黎明2, 王淑杰3
Lin Dian-Yang(林殿阳)a)†, Li Ming(黎明)a)b), Wang Shu-Jie(王淑杰)c), and Lü Zhi-Wei(吕志伟)a)
摘要: This paper reports that the pattern formation in homogeneous solutions of polyisoprene in toluene saturated with C$_{60}$ induced by a continuous-wave visible laser is observed experimentally. The transmitted beam patterns change with the increase of the laser irradiation time. In the initial phase, the patterns with concentric ring-shaped structure are formed. In the end, the patterns become speckle-shaped. The incubation time of the transmitted beam widening is inversely proportional to the laser power density and solution concentration. The pattern formation results from the optical-field-induced refractive index changes in the solutions, but the mechanism of optical-field-induced refractive index changes in the polymer solutions needs to be further studied.
中图分类号: (Dynamics of nonlinear optical systems; optical instabilities, optical chaos and complexity, and optical spatio-temporal dynamics)