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arXiv · 1803.04917

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

Rozenn Diehl·Erik Hebestreit·René Reimann·Martin Frimmer·Felix Tebbenjohanns·Lukas Novotny
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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.

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Rozenn Diehl, Erik Hebestreit, René Reimann, Martin Frimmer, Felix Tebbenjohanns, Lukas Novotny. 2018-03-13. Optical potential mapping with a levitated nanoparticle at sub-wavelength distances from a membrane. https://arxiv.org/abs/1803.04917

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