Momentum measurements with holographic optical tweezers for exploring force detection capabilities on irregular samples

Frederic Català; Ferran Marsà; Arnau Farré; Mario Montes-Usategui; Estela Martín-Badosa

doi:10.1117/12.2061940

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16 September 2014 Momentum measurements with holographic optical tweezers for exploring force detection capabilities on irregular samples

Frederic Català, Ferran Marsà , Arnau Farré , Mario Montes-Usategui, Estela Martín-Badosa

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Proceedings Volume 9164, Optical Trapping and Optical Micromanipulation XI; 91640A (2014) https://doi.org/10.1117/12.2061940
Event: SPIE NanoScience + Engineering, 2014, San Diego, California, United States

Abstract

We show how measurements of forces through the analysis of light momentum changes can be combined with holographic optical tweezers (HOTs) to leverage the potential of this force detection method. As the magnitude is not derived from the sample displacement, no in situ calibration is required, and measurements are not restricted to specific conditions. In particular, we show that forces on irregular particles and beams can also be measured with optical traps by simultaneously applying a force in the same direction to multiple holographically-trapped particles through a constant flow. Finally, we measure forces exerted on micro-cylinders in order to assess their transversal and longitudinal drag coefficients.

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Frederic Català, Ferran Marsà , Arnau Farré , Mario Montes-Usategui, and Estela Martín-Badosa "Momentum measurements with holographic optical tweezers for exploring force detection capabilities on irregular samples", Proc. SPIE 9164, Optical Trapping and Optical Micromanipulation XI, 91640A (16 September 2014); https://doi.org/10.1117/12.2061940

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