Nanomotion of Micro-Objects Driven by Light-Induced Elastic Waves on Solid Interfaces

It has been recently reported that elastic waves induced by nanosecond light pulses can be used to drive nanomotion of micro-objects on frictional solid interfaces, a challenging task for traditional techniques using tiny optical force. In this technique, the main physical quantities and parameters involved are temporal width energy pulses, thermal heating cooling time, friction force, waves. Despite few experimental observations based microfiber systems, microscopic theory, which reveals how these collaboratively enable motion derives what underlying manipulation principles emerge, is absent. paper, comprehensive theoretical analysis---centralized around above listed quantities, illuminated single-friction-point model in conjunction with numerical simulations---is established pedagogically clarify physics. Our results reveal two essential factors technique: (1) use short rapid expansion overwhelming resistance (2) timescale asymmetry accumulating net sliding distance. Moreover, we examine effects spatially distributed beyond consideration, show ``tug-of-war''-like stretching driving process. Given insights, positively predict elastic-wave-based principle could directly translated micro- nanoscale waveguides chips, propose practical design. We wish offer guidelines ongoing efforts interfaces light-induced