论文信息 - Colloidal hydrodynamic coupling in concentric optical vortices

Colloidal hydrodynamic coupling in concentric optical vortices

Optical vortex traps created from helical modes of light can drive fluid-borne colloidal particles in circular trajectories. Concentric circulating rings of particles formed by coaxial optical vortices form a microscopic Couette cell, in which the amount of hydrodynamic drag experienced by the spheres depends on the relative sense of the rings' circulation. Tracking the particles' motions makes possible measurements of the hydrodynamic coupling between the circular particle trains and addresses recently proposed hydrodynamic instabilities for collective colloidal motions on optical vortices.

David G. Grier | Kosta Ladavac

[1] H. Rubinsztein-Dunlop,et al. Optical angular-momentum transfer to trapped absorbing particles. , 1996, Physical review. A, Atomic, molecular, and optical physics.

[2] G. Spalding,et al. Computer-generated holographic optical tweezer arrays , 2000, cond-mat/0008414.

[3] He,et al. Direct observation of transfer of angular momentum to absorptive particles from a laser beam with a phase singularity. , 1995, Physical review letters.

[4] E R Dufresne,et al. Hydrodynamic coupling of two brownian spheres to a planar surface. , 2000, Physical review letters.

[5] David G. Grier,et al. Nanofabrication with holographic optical tweezers , 2002 .

[6] C. Pozrikidis,et al. Boundary Integral and Singularity Methods for Linearized Viscous Flow: The boundary integral equations , 1992 .

[7] M J Padgett,et al. Intrinsic and extrinsic nature of the orbital angular momentum of a light beam. , 2002, Physical review letters.