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Cavity-Based 3D Cooling of a Levitated Nanoparticle via Coherent Scattering

Dominik Windey, Carlos Gonzalez-Ballestero, Patrick Maurer, Lukas Novotny, Oriol Romero-Isart, and René Reimann
Phys. Rev. Lett. 122, 123601 – Published 27 March 2019
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Abstract

We experimentally realize cavity cooling of all three translational degrees of motion of a levitated nanoparticle in vacuum. The particle is trapped by a cavity-independent optical tweezer and coherently scatters tweezer light into the blue detuned cavity mode. For vacuum pressures around 105mbar, minimal temperatures along the cavity axis in the millikelvin regime are observed. Simultaneously, the center-of-mass (c.m.) motion along the other two spatial directions is cooled to minimal temperatures of a few hundred millikelvin. Measuring temperatures and damping rates as the pressure is varied, we find that the cooling efficiencies depend on the particle position within the intracavity standing wave. This data and the behavior of the c.m. temperatures as functions of cavity detuning and tweezer power are consistent with a theoretical analysis of the experiment. Experimental limits and opportunities of our approach are outlined.

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  • Received 21 December 2018

DOI:https://doi.org/10.1103/PhysRevLett.122.123601

Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.

Published by the American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

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Nanoparticles Get Cool by Light Scattering

Published 27 March 2019

Researchers performed 3D cavity cooling of levitated nanoparticles, reaching record low temperatures by utilizing light that scatters off the particles.

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Authors & Affiliations

Dominik Windey1, Carlos Gonzalez-Ballestero2,3, Patrick Maurer2,3, Lukas Novotny1, Oriol Romero-Isart2,3, and René Reimann1,*

  • 1Photonics Laboratory, ETH Zürich, 8093 Zürich, Switzerland
  • 2Institute for Quantum Optics and Quantum Information of the Austrian Academy of Sciences, A-6020 Innsbruck, Austria
  • 3Institute for Theoretical Physics, University of Innsbruck, A-6020 Innsbruck, Austria

  • *rreimann@ethz.ch

See Also

Cavity Cooling of a Levitated Nanosphere by Coherent Scattering

Uroš Delić, Manuel Reisenbauer, David Grass, Nikolai Kiesel, Vladan Vuletić, and Markus Aspelmeyer
Phys. Rev. Lett. 122, 123602 (2019)

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Vol. 122, Iss. 12 — 29 March 2019

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