TY - JOUR

T1 - Dynamics of microparticles trapped in a perfect vortex beam

AU - Chen, Mingzhou

AU - Mazilu, Michael

AU - Arita, Yoshihiko

AU - Wright, Ewan M.

AU - Dholakia, Kishan

PY - 2013/11/15

Y1 - 2013/11/15

N2 - We analyze microparticle dynamics within a "perfect" vortex beam. In contrast to other vortex fields, for any given integer value of the topological charge, a "perfect" vortex beam has the same annular intensity profile with fixed radius of peak intensity. For a given topological charge, the field possesses a well-defined orbital angular momentum density at each point in space, invariant with respect to azimuthal position. We experimentally create a perfect vortex and correct the field in situ, to trap and set in motion trapped microscopic particles. For a given topological charge, a single trapped particle exhibits the same local angular velocity moving in such a field independent of its azimuthal position. We also investigate particle dynamics in "perfect" vortex beams of fractional topological charge. This light field may be applied for novel studies in optical trapping of particles, atoms, and quantum gases.

AB - We analyze microparticle dynamics within a "perfect" vortex beam. In contrast to other vortex fields, for any given integer value of the topological charge, a "perfect" vortex beam has the same annular intensity profile with fixed radius of peak intensity. For a given topological charge, the field possesses a well-defined orbital angular momentum density at each point in space, invariant with respect to azimuthal position. We experimentally create a perfect vortex and correct the field in situ, to trap and set in motion trapped microscopic particles. For a given topological charge, a single trapped particle exhibits the same local angular velocity moving in such a field independent of its azimuthal position. We also investigate particle dynamics in "perfect" vortex beams of fractional topological charge. This light field may be applied for novel studies in optical trapping of particles, atoms, and quantum gases.

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U2 - 10.1364/OL.38.004919

DO - 10.1364/OL.38.004919

M3 - Article

C2 - 24322166

AN - SCOPUS:84887910468

VL - 38

SP - 4919

EP - 4922

JO - Optics Letters

JF - Optics Letters

SN - 0146-9592

IS - 22

ER -