Creating and probing of a perfect vortex in situ with an optically trapped particle
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We experimentally create a 'perfect' vortex beam, which has a uniform ring profile and fixed radius. In contrast with other vortex fields, the intensity profile is independent of its topological charge. We then correct this field in situ using a single trapped particle as a probe. This results in a constant angular velocity for the particle regardless of its position on the beam circumference.
Chen , M , Mazilu , M , Arita , Y , Wright , E M & Dholakia , K 2015 , ' Creating and probing of a perfect vortex in situ with an optically trapped particle ' Optical Review , vol 22 , no. 1 , pp. 162-165 . DOI: 10.1007/s10043-015-0031-7
This work is made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final publication is available at Springer via http://dx.doi.org/10.1007/s10043-015-0031-7
The authors would like to thank the UK Engineering and Physical Sciences Research Council (EPSRC) for funding through grant EP/J01771X/1.
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