Cavity Cooling of a Levitated Nanosphere by Coherent Scattering.

Journal Article (Journal Article)

We report three-dimensional (3D) cooling of a levitated nanoparticle inside an optical cavity. The cooling mechanism is provided by cavity-enhanced coherent scattering off an optical tweezer. The observed 3D dynamics and cooling rates are as theoretically expected from the presence of both linear and quadratic terms in the interaction between the particle motion and the cavity field. By achieving nanometer-level control over the particle location we optimize the position-dependent coupling and demonstrate axial cooling by two orders of magnitude at background pressures of 6×10^{-2}  mbar. We also estimate a significant (>40  dB) suppression of laser phase noise heating, which is a specific feature of the coherent scattering scheme. The observed performance implies that quantum ground state cavity cooling of levitated nanoparticles can be achieved for background pressures below 1×10^{-7}  mbar.

Full Text

Duke Authors

Cited Authors

  • Delić, U; Reisenbauer, M; Grass, D; Kiesel, N; Vuletić, V; Aspelmeyer, M

Published Date

  • March 2019

Published In

Volume / Issue

  • 122 / 12

Start / End Page

  • 123602 -

PubMed ID

  • 30978033

Electronic International Standard Serial Number (EISSN)

  • 1079-7114

International Standard Serial Number (ISSN)

  • 0031-9007

Digital Object Identifier (DOI)

  • 10.1103/physrevlett.122.123602


  • eng