科研之友
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摘要
We discuss the transfer of angular momentum from light to classical nanoparticles. An optical torque is induced by a circularly polarized beam, causing the object to rotate. The effect depends on absorption and geometry in such a way that an isotropic dissipationless object is not affected by the external field. Under constant illumination an asymmetric object may rotate uniformly if the light intensity exceeds a minimum value, below which the object executes a rocking motion. These findings are applied to a bioparticle with spheroidal symmetry.
- 出版日期2011-9
