Attonewton force detection using microspheres in a dual-beam optical trap in high vacuum
arXiv:1503.08799 · doi:10.1103/PhysRevA.91.051805
Abstract
We describe the implementation of laser-cooled silica microspheres as force sensors in a dual-beam optical dipole trap in high vacuum. Using this system we have demonstrated trap lifetimes exceeding several days, attonewton force detection capability, and wide tunability in trapping and cooling parameters. Measurements have been performed with charged and neutral beads to calibrate the sensitivity of the detector. This work establishes the suitability of dual beam optical dipole traps for precision force measurement in high vacuum with long averaging times, and enables future applications including the study of gravitational inverse square law violations at short range, Casimir forces, acceleration sensing, and quantum opto-mechanics.
6 pages, 5 figures, references added, minor changes, fig 4 replaced
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Cited by in corpus (8)
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- Single and two-mode mechanical squeezing of an optically levitated nanodiamond via dressed-state coherence
- Single-photon transfer using levitated cavityless optomechanics
- Sensing with the harmonic oscillator
- An experimental Scheme for Gravitational Scattering in Microscale: The effect of spatial superposition of mass on the microstructure of space-time