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

WM Lee; BPS Ahluwalia; X-C Yuan; WC Cheong; Kishan Dholakia

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

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

WM Lee, BPS Ahluwalia, X-C Yuan, WC Cheong, Kishan Dholakia

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

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 the Optical Society of America A : Optics, Image Science and Vision
Volume	7
DOIs	https://doi.org/10.1088/1464-4258/7/1/001
Publication status	Published - Jan 2005

Keywords

beam shaping
beam splitting
optical elements
devices and systems
beam characteristics
spatial pattern formation
ANGULAR-MOMENTUM
SPIRAL PHASEPLATE
LASER-BEAMS
PARTICLES
GENERATION
VORTICES
MODES

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10.1088/1464-4258/7/1/001

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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.",

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T1 - Optical steering of high and low index microparticles by manipulating an off-axis optical vortex

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AU - Ahluwalia, BPS

AU - Yuan, X-C

AU - Cheong, WC

AU - Dholakia, Kishan

PY - 2005/1

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AB - 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.

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KW - beam splitting

KW - optical elements

KW - devices and systems

KW - beam characteristics

KW - spatial pattern formation

KW - ANGULAR-MOMENTUM

KW - SPIRAL PHASEPLATE

KW - LASER-BEAMS

KW - PARTICLES

KW - GENERATION

KW - VORTICES

KW - MODES

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JO - Journal of the Optical Society of America A : Optics, Image Science and Vision

JF - Journal of the Optical Society of America A : Optics, Image Science and Vision

ER -

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

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Keywords

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