中国物理B ›› 2010, Vol. 19 ›› Issue (12): 124209-124209.doi: 10.1088/1674-1056/19/12/124209

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Optical switching based on the manipulation of microparticles in a colloidal liquid using strong scattering force

刘进, 刘正奇, 冯天华, 戴峭峰, 吴立军, 兰胜   

  1. Laboratory of Photonic Information Technology, School for Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou 510006, China
  • 收稿日期:2010-05-05 修回日期:2010-05-16 出版日期:2010-12-15 发布日期:2010-12-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 10974060 and 10774050 ) and the Program for Innovative Research Team of the Higher Education of Guangdong Province of China (Grant No. 06CXTD005).

Optical switching based on the manipulation of microparticles in a colloidal liquid using strong scattering force

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)   

  1. Laboratory of Photonic Information Technology, School for Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou 510006, China
  • Received:2010-05-05 Revised:2010-05-16 Online:2010-12-15 Published:2010-12-15
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 10974060 and 10774050 ) and the Program for Innovative Research Team of the Higher Education of Guangdong Province of China (Grant No. 06CXTD005).

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.

Abstract: 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.

Key words: optical switching, scattering force, optical matter

中图分类号:  (Mechanical effects of light on atoms, molecules, and ions)

  • 37.10.Vz
42.65.Pc (Optical bistability, multistability, and switching, including local field effects)