Scanning force sensing at $\mu$m-distances from a conductive surface
with nanospheres in an optical lattice
- URL: http://arxiv.org/abs/2103.03420v1
- Date: Fri, 5 Mar 2021 01:38:59 GMT
- Title: Scanning force sensing at $\mu$m-distances from a conductive surface
with nanospheres in an optical lattice
- Authors: Cris Montoya, Eduardo Alejandro, William Eom, Daniel Grass, Nicolas
Clarisse, Apryl Witherspoon, and Andrew A. Geraci
- Abstract summary: We demonstrate a method to trap and manuever nanoparticles in an optical standing wave potential formed by retro-reflecting a laser beam from a metallic mirror surface.
We can reliably position a $sim 170$ nm diameter silica nanoparticles at distances of a few hundred nanometers to tens of microns from the surface of a gold-coated silicon mirror by transferring it from a single-beam tweezer trap into the standing wave potential.
This method enables three-dimensional scanning force sensing near surfaces using optically trapped nanoparticles, promising for high-sensitivity scanning force microscopy, tests of the Casimir effect, and tests of the gravitational inverse
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: The center-of-mass motion of optically trapped dielectric nanoparticles in
vacuum is extremely well-decoupled from its environment, making a powerful tool
for measurements of feeble sub-attonewton forces. We demonstrate a method to
trap and manuever nanoparticles in an optical standing wave potential formed by
retro-reflecting a laser beam from a metallic mirror surface. We can reliably
position a $\sim 170$ nm diameter silica nanoparticle at distances of a few
hundred nanometers to tens of microns from the surface of a gold-coated silicon
mirror by transferring it from a single-beam tweezer trap into the standing
wave potential. We can further scan the two dimensional space parallel to the
mirror surface by using a piezo-driven mirror. This method enables
three-dimensional scanning force sensing near surfaces using optically trapped
nanoparticles, promising for high-sensitivity scanning force microscopy, tests
of the Casimir effect, and tests of the gravitational inverse square law at
micron scales.
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