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

Hongchang Deng; Libo Yuan

doi:10.1117/12.2058661

2 June 2014 Highly focused conical optical field for Pico-Newton scale force sensing

Hongchang Deng, Libo Yuan

Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 91577I (2014) https://doi.org/10.1117/12.2058661
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain

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.

Citation Download Citation

Hongchang Deng and Libo Yuan "Highly focused conical optical field for Pico-Newton scale force sensing", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91577I (2 June 2014); https://doi.org/10.1117/12.2058661

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