Optical steering of high and low index microparticles by manipulating an off-axis optical vortex

W. M. Lee; B. P.S. Ahluwalia; X. C. Yuan; W. C. Cheong; K. Dholakia

doi:10.1088/1464-4258/7/1/001

Optical steering of high and low index microparticles by manipulating an off-axis optical vortex

W. M. Lee, B. P.S. Ahluwalia, X. C. Yuan, W. C. Cheong, K. Dholakia

Department of Physics

Research output: Contribution to journal › Article › peer-review

23 Citations (Scopus)

Abstract

We demonstrate the use of a rotating off-axis optical phase singularity, generated through an intentional misalignment of a high optical efficiency spiral phase plate (SPP), to optically steer both high and low index microparticles trapped within the optical beam in a controlled manner. This intentional misalignment of the SPP creates an asymmetrical intensity beam pattern due to the optical vortex being displaced from the centre of the beam propagation axis. By using this optical beam pattern, we propose that a cell can be trapped by an optical beam of matching beam diameter while its internal structure can be manipulated by the off-axis optical vortex.

Original language	English
Pages (from-to)	1-6
Number of pages	6
Journal	Journal of Optics A: Pure and Applied Optics
Volume	7
Issue number	1
DOIs	https://doi.org/10.1088/1464-4258/7/1/001
Publication status	Published - 2005 Jan

All Science Journal Classification (ASJC) codes

Atomic and Molecular Physics, and Optics

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AU - Dholakia, K.

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Optical steering of high and low index microparticles by manipulating an off-axis optical vortex

Abstract

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