Study of light induced attractive force between two metallic bodies with a sub wavelength slit

激光操纵宏观、微观和纳米物体的方法的发展引起了现代技术的高度关注。使用现代光学镊子，主要是对介电粒子进行操纵。用现代光学镊子几乎不可能操纵大于数百纳米的金属颗粒。预测了一种新的光诱导力，根据理论模型，当偏振光被插入到由两个金属物体形成的狭缝中，并且狭缝宽度小于光波长的一半时，就会产生新的光诱导力。这种力可以用来在真空和液体中操纵金属宏观、微观和纳米物体。对力的大小的估计表明，它足以用于实际应用。一种可能性是开发光学可切换结构。本项目提案描述了在对部队进行实验核查方面已经取得的进展。该项目的目标是最终的实验验证，改进光诱导力的理论模型，并研究光诱导力对不同参数如狭缝宽度的依赖关系。

The development of methods for the manipulation of macro, micro and nano objects by laser light is of high interest for modern technologies. With modern optical tweezers mostly dielectric particles are manipulated. A manipulation of metallic particles bigger than hundred nanometers is virtually not possible with modern optical tweezers. A new light induced force was predicted, which, according to the theoretical model, arises when polarized light is inserted into a slit formed by two metallic bodies and the slit width is smaller than half the light wavelength. The force can be used to manipulate metallic macro, micro and nano objects in vacuum and in liquids. Estimation of the magnitude of the force showed that it is sufficient for a practical application. One possibility would be the development of optical switchable structures. The already made advances towards the experimental verification of the force are described in this project proposal. The Goal of the project is the final experimental verification, the improvement of the theoretical model for the light induced force and the studies of the forces dependency on different parameters such as the slit width.