2 June 2014 Highly focused conical optical field for Pico-Newton scale force sensing
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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.
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Hongchang Deng, 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); doi: 10.1117/12.2058661; https://doi.org/10.1117/12.2058661
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