中国物理B ›› 2010, Vol. 19 ›› Issue (12): 124209-124209.doi: 10.1088/1674-1056/19/12/124209
刘进, 刘正奇, 冯天华, 戴峭峰, 吴立军, 兰胜
Liu Jin(刘进), Liu Zheng-Qi(刘正奇), Feng Tian-Hua(冯天华), Dai Qiao-Feng(戴峭峰), Wu Li-Jun(吴立军), Lan Sheng(兰胜)†
摘要: This paper demonstrates the realization of an optical switch by optically manipulating a large number of polystyrene spheres contained in a capillary. The strong scattering force exerted on polystyrene spheres with a large diameter of 4.3 μm is employed to realize the switching operation. A transparent window is opened for the signal light when the polystyrene spheres originally located at the beam centre are driven out of the beam region by the strong scattering force induced by the control light. The switching dynamics under different incident powers is investigated and compared with that observed in the optical switch based on the formation of optical matter. It is found that a large extinction ratio of ~30dB and fast switching-on and switching-off times can be achieved in this type of switch.
中图分类号: (Mechanical effects of light on atoms, molecules, and ions)