Giant and tunable optical torque for micro-motors by increased force arm and resonantly enhanced force

Abstract Micro-motors driven by light field have attracted much attentions for their potential applications. In order to drive the rotation of a micro-motor, structured optical beams with orbital angular momentum, spin angular momentum, anisotropic medium, and/or inhomogeneous intensity distribution...

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Autores principales:	Yong Geng, Jiubin Tan, Yongyin Cao, Yixuan Zhao, Zhengjun Liu, Weiqiang Ding
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/d024d5dd1ec044c1a4d091c0e016e677
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spelling	oai:doaj.org-article:d024d5dd1ec044c1a4d091c0e016e6772021-12-02T15:08:27ZGiant and tunable optical torque for micro-motors by increased force arm and resonantly enhanced force10.1038/s41598-018-21235-x2045-2322https://doaj.org/article/d024d5dd1ec044c1a4d091c0e016e6772018-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-21235-xhttps://doaj.org/toc/2045-2322Abstract Micro-motors driven by light field have attracted much attentions for their potential applications. In order to drive the rotation of a micro-motor, structured optical beams with orbital angular momentum, spin angular momentum, anisotropic medium, and/or inhomogeneous intensity distribution should be used. Even though, it is still challenge to increase the optical torques (OT) in a flexible and controllable way in case of moderate incident power. In this paper, a new scheme achieving giant optical torque is proposed by increasing both the force arm and the force amplitude with the assistance of a ring resonator. In this case, the optical torque doesn’t act on the target directly by the incident beam, but is transmitted to it by rotating the ring resonator connected with it. Using the finite-difference in time-domain method, we calculate the optical torque and find that both the direction and the amplitude of the torque can be tuned flexibly by modifying the frequency, or the relative phases of the sources. More importantly, the optical torque obtained here by linearly polarized beams can be 3 orders larger than those obtained using the structured beams. This opt-mechanical-resonator based optical torque engineering system may find potential applications in optical driven micro-machines.Yong GengJiubin TanYongyin CaoYixuan ZhaoZhengjun LiuWeiqiang DingNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-9 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yong Geng Jiubin Tan Yongyin Cao Yixuan Zhao Zhengjun Liu Weiqiang Ding Giant and tunable optical torque for micro-motors by increased force arm and resonantly enhanced force
description	Abstract Micro-motors driven by light field have attracted much attentions for their potential applications. In order to drive the rotation of a micro-motor, structured optical beams with orbital angular momentum, spin angular momentum, anisotropic medium, and/or inhomogeneous intensity distribution should be used. Even though, it is still challenge to increase the optical torques (OT) in a flexible and controllable way in case of moderate incident power. In this paper, a new scheme achieving giant optical torque is proposed by increasing both the force arm and the force amplitude with the assistance of a ring resonator. In this case, the optical torque doesn’t act on the target directly by the incident beam, but is transmitted to it by rotating the ring resonator connected with it. Using the finite-difference in time-domain method, we calculate the optical torque and find that both the direction and the amplitude of the torque can be tuned flexibly by modifying the frequency, or the relative phases of the sources. More importantly, the optical torque obtained here by linearly polarized beams can be 3 orders larger than those obtained using the structured beams. This opt-mechanical-resonator based optical torque engineering system may find potential applications in optical driven micro-machines.
format	article
author	Yong Geng Jiubin Tan Yongyin Cao Yixuan Zhao Zhengjun Liu Weiqiang Ding
author_facet	Yong Geng Jiubin Tan Yongyin Cao Yixuan Zhao Zhengjun Liu Weiqiang Ding
author_sort	Yong Geng
title	Giant and tunable optical torque for micro-motors by increased force arm and resonantly enhanced force
title_short	Giant and tunable optical torque for micro-motors by increased force arm and resonantly enhanced force
title_full	Giant and tunable optical torque for micro-motors by increased force arm and resonantly enhanced force
title_fullStr	Giant and tunable optical torque for micro-motors by increased force arm and resonantly enhanced force
title_full_unstemmed	Giant and tunable optical torque for micro-motors by increased force arm and resonantly enhanced force
title_sort	giant and tunable optical torque for micro-motors by increased force arm and resonantly enhanced force
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/d024d5dd1ec044c1a4d091c0e016e677
work_keys_str_mv	AT yonggeng giantandtunableopticaltorqueformicromotorsbyincreasedforcearmandresonantlyenhancedforce AT jiubintan giantandtunableopticaltorqueformicromotorsbyincreasedforcearmandresonantlyenhancedforce AT yongyincao giantandtunableopticaltorqueformicromotorsbyincreasedforcearmandresonantlyenhancedforce AT yixuanzhao giantandtunableopticaltorqueformicromotorsbyincreasedforcearmandresonantlyenhancedforce AT zhengjunliu giantandtunableopticaltorqueformicromotorsbyincreasedforcearmandresonantlyenhancedforce AT weiqiangding giantandtunableopticaltorqueformicromotorsbyincreasedforcearmandresonantlyenhancedforce
_version_	1718388150603087872

Giant and tunable optical torque for micro-motors by increased force arm and resonantly enhanced force

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