转子(电动)
能量转换效率
涡轮机
功率(物理)
电效率
物理
光学
材料科学
光子
机械
机械工程
光电子学
工程类
热力学
作者
Xiaofeng Lin,Guoqing Hu,Qi‐Dai Chen,Li‐Gang Niu,Qi-Song Li,Andreas Ostendorf,Hong‐Bo Sun
摘要
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.
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