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Publication Citation: Sub-micron force detection using optically-cooled levitated microspheres

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Author(s): Andrew Geraci; Scott B. Papp; John E. Kitching;
Title: Sub-micron force detection using optically-cooled levitated microspheres
Published: September 03, 2010
Abstract: We propose an experiment using optically trapped and cooled dielectric microspheres for the detection of short-range forces. The center-of-mass motion of a microsphere trapped in vacuum can experience extremely low dissipation and quality factors of 1012, leading to yoctoNewton force sensitivity. Trapping the sphere in an optical field enables positioning at less than 1 υm from a surface, a regime where exotic new forces may exist. We expect that the proposed system could advance the search for non-Newtonian gravity forces via an enhanced sensitivity of 105 -107 over current experiments at the micron length scale. Moreover, our system may be useful for characterizing other short-range physics such as Casimir forces.
Citation: Physical Review
Volume: 105
Pages: pp. 101101-1 - 101101-4
Keywords: Casimir force;cavity cooling;non-Newtonian gravity;optical trapping;optomechanics
Research Areas: Physics, Optical Physics
PDF version: PDF Document Click here to retrieve PDF version of paper (420KB)