Stroboscopic detection of multi-colloidal hydrodynamics using time-multiplexed optical tweezers

Thomas F. Dixon; Peter J. Reece

doi:10.1117/12.2567546

20 August 2020 Stroboscopic detection of multi-colloidal hydrodynamics using time-multiplexed optical tweezers

Thomas F. Dixon, Peter J. Reece

Proceedings Volume 11463, Optical Trapping and Optical Micromanipulation XVII; 114630C (2020) https://doi.org/10.1117/12.2567546
Event: SPIE Nanoscience + Engineering, 2020, Online Only

Abstract

Time-division multiplexing presents an attractive opportunity to probe multi-colloidal interactions in optical traps at short time-scales. In this paper, we demonstrate a stroboscopic system capable of arbitrary control of multiple trapped colloids with sensing at kHz rates and validate it using several simple multi-colloidal experiments. We expect this methodology will be of benefit in the study of group colloidal hydrodynamics and systems of active colloids, particularly where a temporal sensitivity beyond that of camera-based position sensing is required. In addition, our multiplexing enables in situ calibration that is robust to environmental anomalies, shape distortions of colloids and scattering interference from other particles.

Conference Presentation

Citation Download Citation

Thomas F. Dixon and Peter J. Reece "Stroboscopic detection of multi-colloidal hydrodynamics using time-multiplexed optical tweezers", Proc. SPIE 11463, Optical Trapping and Optical Micromanipulation XVII, 114630C (20 August 2020); https://doi.org/10.1117/12.2567546

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