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当一束光照射在物质上,光子与物质发生动量交换,部分动量转移到物质,等效于对物质产生作用力,称为光学力.这一作用力非常弱,一般在pN甚至更小的量级,但一定条件下,仍足以捕获和操纵纳米、微米尺度的物体.在金属纳米结构中,由于表面等离激元共振效应,诱导的局域电场可以产生增强的光学力,可以在亚波长尺度实现光操纵,并且由此衍生出一个极具吸引力的研究方向——表面等离激元光学力.本文介绍了利用金属纳米结构进行表面等离激元光学力操纵的最新研究进展.
When a beam of light shines on the material, photons and matter occur momentum exchange, part of the momentum transfer to the material, equivalent to the material force, known as optical force. This force is very weak, usually in pN even smaller But under certain conditions is still sufficient to capture and manipulate objects on the nanometer and micrometer scale.In the metallic nanostructures, the induced local electric field can produce enhanced optical power due to the surface plasmon resonance effect, Wavelength-scale light manipulation, and thus derived a very attractive research direction - surface plasmon optical force.This paper describes the use of metal nanostructures surface plasmon optical force manipulation of the latest research progress.