Fiber-based scanning levitated nanoparticle force sensor near a metalized membrane

Abstract

We describe a fiber-based dual-beam trap for dielectric nanospheres with the ability to transfer the trapped particles into a retro-reflective standing-wave trap within micron-range distances of a metallic mirror surface. We illustrate its capability for three dimensional scanning force sensing over a several square micron area of an ultra-thin gold-coated silicon nitride mirror-membrane with a total thickness of approximately 370~nm. We also demonstrate three-dimensional laser feedback cooling and zeptonewton force resolution in high-vacuum at micron range from the membrane, showing promise for future improved tests of gravity at short distances and other surface force investigations. By using charged nanospheres, we expect the method may be useful for studying fluctuating patch potentials and electric field noise in the vicinity of a surface in the ∼ kHz to ∼ 100 kHz frequency regime.

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BibTeX RIS

BibTeX

@misc{dana2026fiberbased,
  title = {{Fiber-based scanning levitated nanoparticle force sensor near a metalized membrane}},
  author = {Andrew M. Dana and Samuel J. Borden and Nia Burrell and Chethn Galla and Alexey Grinin and Mark Nguyen and Kristina Menon and Shafaq Elahi and Katarina Boskovic Guy and Andrew Laeuger and Evan Weisman and Gambhir Ranjit and Andrew A. Geraci},
  howpublished = {arXiv},
  year = {2026},
  month = sep,
  doi = {10.48550/arxiv.2609.29829},
  eprint = {2609.29829},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2609.29829},
  note = {CC BY 4.0},
}

RIS

TY  - UNPB
TI  - Fiber-based scanning levitated nanoparticle force sensor near a metalized membrane
AU  - Andrew M. Dana
AU  - Samuel J. Borden
AU  - Nia Burrell
AU  - Chethn Galla
AU  - Alexey Grinin
AU  - Mark Nguyen
AU  - Kristina Menon
AU  - Shafaq Elahi
AU  - Katarina Boskovic Guy
AU  - Andrew Laeuger
AU  - Evan Weisman
AU  - Gambhir Ranjit
AU  - Andrew A. Geraci
PY  - 2026
DA  - 2026/09/24
PB  - arXiv
DO  - 10.48550/arxiv.2609.29829
UR  - https://arxiv.org/abs/2609.29829
AB  - We describe a fiber-based dual-beam trap for dielectric nanospheres with the ability to transfer the trapped particles into a retro-reflective standing-wave trap within micron-range distances of a metallic mirror surface. We illustrate its capability for three dimensional scanning force sensing over a several square micron area of an ultra-thin gold-coated silicon nitride mirror-membrane with a total thickness of approximately 370~nm. We also demonstrate three-dimensional laser feedback cooling and zeptonewton force resolution in high-vacuum at micron range from the membrane, showing promise for future improved tests of gravity at short distances and other surface force investigations. By using charged nanospheres, we expect the method may be useful for studying fluctuating patch potentials and electric field noise in the vicinity of a surface in the ∼ kHz to ∼ 100 kHz frequency regime.
ER  -

Abstract

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