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

doi:10.1088/1674-1056/19/12/124209

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.

Keywords: optical switching scattering force optical matter

Received: 05 May 2010
Revised: 16 May 2010
Accepted manuscript online:

PACS:	37.10.Vz	(Mechanical effects of light on atoms, molecules, and ions)
	42.65.Pc	(Optical bistability, multistability, and switching, including local field effects)

Fund: 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).

Cite this article:

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) Optical switching based on the manipulation of microparticles in a colloidal liquid using strong scattering force 2010 Chin. Phys. B 19 124209

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

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