A self-calibrating optomechanical force sensor with femtonewton resolution

John Melcher; Julian Stirling; Felipe Guzmán Cervantes; Jon R. Pratt; Gordon A. Shaw

doi:10.1063/1.4903801

A self-calibrating optomechanical force sensor with femtonewton resolution

John Melcher, Julian Stirling, Felipe Guzmán Cervantes, Jon R. Pratt, Gordon A. Shaw

Research output: Contribution to journal › Article › peer-review

34 Scopus citations

Abstract

We report the development of an ultrasensitive optomechanical sensor designed to improve the accuracy and precision of force measurements with atomic force microscopy. The sensors reach quality factors of 4.3 × 10⁶ and force resolution on the femtonewton scale at room temperature. Self-calibration of the sensor is accomplished using radiation pressure to create a reference force. Self-calibration enables in situ calibration of the sensor in extreme environments, such as cryogenic ultra-high vacuum. The senor technology presents a viable route to force measurements at the atomic scale with uncertainties below the percent level.

Original language	English (US)
Article number	233109
Journal	Applied Physics Letters
Volume	105
Issue number	23
DOIs	https://doi.org/10.1063/1.4903801
State	Published - Dec 8 2014
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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AU - Shaw, Gordon A.

PY - 2014/12/8

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AB - We report the development of an ultrasensitive optomechanical sensor designed to improve the accuracy and precision of force measurements with atomic force microscopy. The sensors reach quality factors of 4.3 × 106 and force resolution on the femtonewton scale at room temperature. Self-calibration of the sensor is accomplished using radiation pressure to create a reference force. Self-calibration enables in situ calibration of the sensor in extreme environments, such as cryogenic ultra-high vacuum. The senor technology presents a viable route to force measurements at the atomic scale with uncertainties below the percent level.

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A self-calibrating optomechanical force sensor with femtonewton resolution

Abstract

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