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Updated: Jun 11, 2025

Atomic Force Microscopy of Red-Light Photoreceptors Using PeakForce Quantitative Nanomechanical Property Mapping
Published on: October 24, 2014
Quectonewton Local Force Sensor
Yann Balland1, Luc Absil1, Franck Pereira Dos Santos1
1LNE-<a href="https://ror.org/03tdef037">SYRTE</a>, Observatoire de Paris, <a href="https://ror.org/013cjyk83">Université PSL</a>, CNRS, <a href="https://ror.org/02en5vm52">Sorbonne Université</a>, 61 avenue de l'Observatoire, 75014 Paris, France.
Abstract:
We report on the realization of a quantum sensor based on trapped atom interferometry in an optical lattice for the measurement of atom-surface interactions, with sub-micrometer-level control of the mean atom-surface separation distance. The force sensor reaches a short-term sensitivity of 3.4×10^{-28} N at 1 s and a long-term stability of 4 qN (4×10^{-30} N). We perform force measurements in the 0-300 μm range, and despite significant stray forces caused by adsorbed atoms on the surface, we obtain evidence of the Casimir-Polder force.
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