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Title: Nanoscale Lamb wave–driven motors in nonliquid environments
Authors: Lu, J.
Li, Q.
Qiu, C.-W. 
Hong, Y.
Ghosh, P.
Qiu, M.
Issue Date: 2019
Publisher: American Association for the Advancement of Science
Citation: Lu, J., Li, Q., Qiu, C.-W., Hong, Y., Ghosh, P., Qiu, M. (2019). Nanoscale Lamb wave–driven motors in nonliquid environments. Science Advances 5 (3) : eaau8271. ScholarBank@NUS Repository.
Rights: Attribution-NonCommercial 4.0 International
Abstract: Achieving light-driven motions in nonliquid environments presents formidable challenges, because microsized objects experience strong dry adhesion and intend to be stuck to contact surfaces with great tenacity. Here, in air and vacuum, we show rotary locomotion of a micrometer-sized metal plate with ~30 nm thickness, revolving around a microfiber. This motor is powered by pulsed light guided into the fiber as a coordinated consequence of an optically excited Lamb wave on the plate and favorable configuration of plate-fiber geometry. The motor, actuated by designed light pulses, crawls stepwise with subnanometer locomotion resolution. Furthermore, we can control the rotation velocity and step resolution by varying the repetition rate and pulse power, respectively. A light-actuated micromirror scanning with 0.001° resolution is then demonstrated on the basis of this motor. It offers unprecedented application potential for integrated micro-opto-electromechanical systems, outer-space all-optical precision mechanics and controls, and laser scanning for miniature lidar systems. Copyright © 2019 The Authors, some rights reserved.
Source Title: Science Advances
ISSN: 2375-2548
DOI: 10.1126/sciadv.aau8271
Rights: Attribution-NonCommercial 4.0 International
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