Optomechanical Motions of Gold Dimer’s Spin, Rotation and Revolution Manipulated by Bessel Beam
Chao-Kang Liu,
Yun-Cheng Ku,
Mao-Kuen Kuo
et al.
Abstract:The optomechanical motions of a pair of optically bound gold nanoparticles (GNPs), in fluid manipulated by a Bessel beam are studied. Since a Bessel beam possesses orbital angular momentum (OAM) and spin angular momentum (SAM) simultaneously, complicated rigid-body motions of the dimer can be induced. The mechanism involves the equilibrium between the optical force with the reactive drag force exerted by the fluid. Our results demonstrate that the 2D planar motion includes the rotation of the dimer around its … Show more
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