We demonstrate an optical method to modify friction forces between two close-contact surfaces through laser-induced shock waves, which can strongly enhance surface friction forces in a sandwiched confinement with/without lubricant, due to the increase of pressure arising from excited shock waves. Such enhanced friction can even lead to a rotating rotor’s braking effect. Meanwhile, this shock wave-modified friction force is found to decrease under a free-standing configuration. This technique of optically controllable friction may pave the way for applications in optical levitation, transportation, and microfluidics.

中文翻译：

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激光冲击波引起的光制动

我们展示了一种通过激光诱导的冲击波来改变两个紧密接触表面之间的摩擦力的光学方法，由于激发的冲击波产生的压力增加，这种方法可以在有/没有润滑剂的情况下强烈增强夹层限制中的表面摩擦力。这种增强的摩擦力甚至会导致旋转转子的制动效果。同时，发现这种冲击波修正的摩擦力在独立配置下会减小。这种光学可控摩擦技术可能为光学悬浮、运输和微流体的应用铺平道路。