Quantum limited particle sensing in optical tweezers

Tay, Jian Wei, Hsu, Magnus T. L. and Bowen, Warwick P. (2009) Quantum limited particle sensing in optical tweezers. Physical Review A, 80 6: 063806-1-063806-9. doi:10.1103/PhysRevA.80.063806

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Author Tay, Jian Wei
Hsu, Magnus T. L.
Bowen, Warwick P.
Title Quantum limited particle sensing in optical tweezers
Journal name Physical Review A   Check publisher's open access policy
ISSN 1050-2947
Publication date 2009-12-03
Sub-type Article (original research)
DOI 10.1103/PhysRevA.80.063806
Open Access Status File (Publisher version)
Volume 80
Issue 6
Start page 063806-1
End page 063806-9
Total pages 9
Place of publication College Park, MD, United States
Publisher American Physical Society
Collection year 2010
Language eng
Abstract Particle sensing in optical tweezers systems provides information on the position, velocity, and force of the specimen particles. The conventional quadrant detection scheme is applied ubiquitously in optical tweezers experiments to quantify these parameters. In this paper, we show that quadrant detection is nonoptimal for particle sensing in optical tweezers and propose an alternative optimal particle sensing scheme based on spatial homodyne detection. A formalism for particle sensing in terms of transverse spatial modes is developed and numerical simulations of the efficacies of both quadrant and spatial homodyne detection are shown. We demonstrate that 1 order of magnitude improvement in particle sensing sensitivity can be achieved using spatial homodyne over quadrant detection.
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ
Additional Notes Article #063806

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mathematics and Physics
2010 Higher Education Research Data Collection
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Citation counts: TR Web of Science Citation Count  Cited 14 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 6 times in Scopus Article | Citations
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Created: Sun, 17 Jan 2010, 00:01:38 EST