An optical reaction micro-turbine.
An optical reaction micro-turbine.
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DOI:
10.1038/s41467-018-06947-y
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发表时间:
2018-10-26
影响因子:
16.6
通讯作者:
Di Leonardo R
中科院分区:
文献类型:
--
作者:
Bianchi S;Vizsnyiczai G;Ferretti S;Maggi C;Di Leonardo R
To any energy flow there is an associated flow of momentum, so that recoil forces arise every time an object absorbs or deflects incoming energy. This same principle governs the operation of macroscopic turbines as well as that of microscopic turbines that use light as the working fluid. However, a controlled and precise redistribution of optical energy is not easy to achieve at the micron scale resulting in a low efficiency of power to torque conversion. Here we use direct laser writing to fabricate 3D light guiding structures, shaped as a garden sprinkler, that can precisely reroute input optical power into multiple output channels. The shape parameters are derived from a detailed theoretical analysis of losses in curved microfibers. These optical reaction micro-turbines can maximally exploit light’s momentum to generate a strong, uniform and controllable torque. Light can be used to rotate micrometric turbines that usually rely on scattering to redistribute optical momentum and generate a mechanical torque. Here, 3D microfabricated light guiding structures can reroute an incoming flow of optical energy to generate a strong, uniform and controllable torque.
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影响因子:
64.8
作者:
Kawata, S;Sun, HB;Takada, K
通讯作者:
Takada, K
影响因子:
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作者:
MARCUSE, D
通讯作者:
MARCUSE, D
影响因子:
8.6
作者:
Bishop, AI;Nieminen, TA;Rubinsztein-Dunlop, H
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Rubinsztein-Dunlop, H
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1.9
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SHARMA, AB;ALANI, AH;HALME, SJ
通讯作者:
HALME, SJ
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3.3
作者:
Asavei, Theodor;Nieminen, Timo A.;Rubinsztein-Dunlop, Halina
通讯作者:
Rubinsztein-Dunlop, Halina