Phys. Rev. Lett. 90, 133901 (2003) [4 pages]Structure of Optical VorticesReceived 7 August 2002; published 3 April 2003 Helical modes of light can be focused into toroidal optical traps known as optical vortices, which are capable of localizing and applying torques to small volumes of matter. Measurements of optical vortices created with the dynamic holographic optical tweezer technique reveal an unsuspected dependence of their structure and angular momentum flux on their helicity. These measurements also provide evidence for a novel optical ratchet potential in practical optical vortices. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.90.133901
DOI:
10.1103/PhysRevLett.90.133901
PACS:
42.25.–p, 05.40.Jc, 42.40.Jv, 87.80.Cc
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