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Proceedings Paper

Highly focused conical optical field for Pico-Newton scale force sensing
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Paper Abstract

We propose a highly focused conical optical filed generated by cone-frustum-shaped annular core fiber tip for Pico- Newton scale force sensing. We show that there are stable three-dimensional trap-points for Rayleigh particles in the main lobe and every ring of such field with Bessel-like profile. And the transverse trapping forces are much greater (almost 30 times) than their corresponding longitudinal radiation forces so that a particle trapped by highly focused conical beam is only sensitive for disturbing force in longitudinal direction. Force sensitivities in longitudinal direction and the detection range are also discussed.

Paper Details

Date Published: 2 June 2014
PDF: 4 pages
Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91577I (2 June 2014); doi: 10.1117/12.2058661
Show Author Affiliations
Hongchang Deng, Harbin Engineering Univ. (China)
Libo Yuan, Harbin Engineering Univ. (China)

Published in SPIE Proceedings Vol. 9157:
23rd International Conference on Optical Fibre Sensors
José M. López-Higuera; Julian D. C. Jones; Manuel López-Amo; José Luis Santos, Editor(s)

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