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Realizing optical manipulation of microscopic objects is crucial in theresearch fields of life science, condensed matter physics and physicalchemistry. In non-liquid environments, this task is commonly regarded asdifficult due to strong adhesive surface force ($\sim\mu\rm N$) between solidinterfaces that makes tiny optical driven force ($\sim\rm pN$) insignificant.Here, by recognizing the microscopic interaction mechanism between frictionforce -- the parallel component of surface force on the contact surface -- andthermoelastic waves induced by pulsed optical absorption, we establish ageneral principle enabling the actuation of micro-objects on dry frictionalsurfaces based on the opto-thermo-mechanical effects. Theoretically, we predictthat nanosecond pulsed optical absorption with mW-scale peak power issufficient to tame $\mu\rm N$-scale friction force. Experimentally, wedemonstrate that two-dimensional spiral motion of gold plates on micro-fibersdriven by a nanosecond pulsed laser, and reveal the specific rules of motioncontrol. Our results pave the way for future development of micro-scaleactuators in nonliquid environments.

Micro-scale opto-thermo-mechanical actuation in the dry adhesive regime