On shotnoise and Brownian motion limits to the accuracy of particle positioning with optical tweezers

Jian Wei Tay; Xue Jiang; Warwick P. Bowen

doi:10.1117/12.769285

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8 January 2008 On shotnoise and Brownian motion limits to the accuracy of particle positioning with optical tweezers

Jian Wei Tay, Xue Jiang, Warwick P. Bowen

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Proceedings Volume 6801, Photonics: Design, Technology, and Packaging III; 68010Z (2008) https://doi.org/10.1117/12.769285
Event: SPIE Microelectronics, MEMS, and Nanotechnology, 2007, Canberra, ACT, Australia

Abstract

This paper examines the fundamental resolution limit of particle positioning with optical tweezers due to the combined effects of Brownian motion and optical shotnoise. It is found that Brownian motion dominates at low signal frequencies, whilst shotnoise dominates at high frequencies, with the exact crossover frequency varying by many orders of magnitude depending on experimental parameters such as particle size and trapping beam power. These results are significant both for analysis of the bandwidth limits of particle monitoring with optical tweezers and for enhancements of optical tweezer systems based on non-classical states of light.

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Jian Wei Tay, Xue Jiang, and Warwick P. Bowen "On shotnoise and Brownian motion limits to the accuracy of particle positioning with optical tweezers", Proc. SPIE 6801, Photonics: Design, Technology, and Packaging III, 68010Z (8 January 2008); https://doi.org/10.1117/12.769285

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