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A light-driven turbine-like micro-rotor and study on its light-to-mechanical power conversion efficiency

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7 Author(s)
Lin, Xiao-Feng ; State Key Laboratory on Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun 130012, China ; Hu, Guo-Qing ; Chen, Qi-Dai ; Niu, Li-Gang
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A light driven micro-rotor is a useful telecontrolled device free of mechanical contact for power supply. However, low efficiency in converting light to mechanical power detracts from its advantages because it incurs a high power consumption that might result in unwanted effects. For a systematic study on conversion efficiency, we designed a turbine-like micro-rotor and made a quantitative analysis by computational fluid dynamics and semiclassical optics. Much larger in size than those ever reported, our rotor could rotate at over 500 r/min. Denoted by average angular momentum transfer, its conversion efficiency was experimentally determined as high as 34.55 ℏ/photon.

Published in:

Applied Physics Letters  (Volume:101 ,  Issue: 11 )

Date of Publication:

Sep 2012

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