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Optical potential mapping with a levitated nanoparticle at sub-wavelength distances from a membrane

R. Diehl,E. Hebestreit,R. Reimann,M. Frimmer,F. Tebbenjohanns,L. Novotný

Published 2018 in arXiv: Optics

ABSTRACT

The controllable positioning of a vacuum-levitated object near a material surface is of importance for studying short-range forces, such as Casimir forces, interfacial friction forces, or gravity in yet unexplored parameter regimes. Here we optically levitate a nanoparticle in a laser beam strongly focused on a dielectric membrane. By investigating the motion of the trapped particle in vacuum, we map the position-dependent optical potential of the particle. We interferometrically measure the distance between the particle and the surface and demonstrate stable trapping in sub-wavelength proximity of the dielectric surface. Our work is important for the development of on-chip levitated optomechanics and for measuring short-range forces at sub-wavelength distances.

PUBLICATION RECORD

  • Publication year

    2018

  • Venue

    arXiv: Optics

  • Publication date

    2018-03-13

  • Fields of study

    Materials Science, Physics

  • Identifiers
    arXiv 1803.04917
  • External record

    Open on Semantic Scholar

  • Source metadata

    Semantic Scholar

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