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5 October 2023 Sensing inertia with rotational optical tweezers
Mark L. Watson, Alexander B. Stilgoe, Itia A. Favre-Bulle, Timo A. Nieminen, Halina Rubinsztein-Dunlop
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Proceedings Volume PC12649, Optical Trapping and Optical Micromanipulation XX; PC126491A (2023) https://doi.org/10.1117/12.2677236
Event: SPIE Nanoscience + Engineering, 2023, San Diego, California, United States
Abstract
The inertial behaviour of a microscopic particle is obscured by its Brownian motion within a fluid. Collisions with fluid molecules give the particle velocity which dissipates on exceedingly short time scales due to the opposing drag forces from the fluid. Studying the motion at these very short time scales provides useful information about dynamic systems. In this work, we detail our approach to measure the angular velocity at these short time scales using Rotational Optical Tweezers enabling novel measurements of rotational dynamics and studying systems that are out of equilibrium.
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Mark L. Watson, Alexander B. Stilgoe, Itia A. Favre-Bulle, Timo A. Nieminen, and Halina Rubinsztein-Dunlop "Sensing inertia with rotational optical tweezers", Proc. SPIE PC12649, Optical Trapping and Optical Micromanipulation XX, PC126491A (5 October 2023); https://doi.org/10.1117/12.2677236
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KEYWORDS
Optical tweezers
Particles
Angular velocity
Polarization
Microfluidics
Microspheres
Scattered light
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