Optically driven ultra-stable nanomechanical rotor

Stefan Kuhn (), Benjamin A. Stickler, Alon Kosloff, Fernando Patolsky, Klaus Hornberger, Markus Arndt and James Millen
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Stefan Kuhn: University of Vienna, Faculty of Physics, VCQ
Benjamin A. Stickler: University of Duisburg-Essen
Alon Kosloff: School of Chemistry, Tel-Aviv University
Fernando Patolsky: School of Chemistry, Tel-Aviv University
Klaus Hornberger: University of Duisburg-Essen
Markus Arndt: University of Vienna, Faculty of Physics, VCQ
James Millen: University of Vienna, Faculty of Physics, VCQ

Nature Communications, 2017, vol. 8, issue 1, 1-5

Abstract: Abstract Nanomechanical devices have attracted the interest of a growing interdisciplinary research community, since they can be used as highly sensitive transducers for various physical quantities. Exquisite control over these systems facilitates experiments on the foundations of physics. Here, we demonstrate that an optically trapped silicon nanorod, set into rotation at MHz frequencies, can be locked to an external clock, transducing the properties of the time standard to the rod’s motion with a remarkable frequency stability f r/Δf r of 7.7 × 1011. While the dynamics of this periodically driven rotor generally can be chaotic, we derive and verify that stable limit cycles exist over a surprisingly wide parameter range. This robustness should enable, in principle, measurements of external torques with sensitivities better than 0.25 zNm, even at room temperature. We show that in a dilute gas, real-time phase measurements on the locked nanorod transduce pressure values with a sensitivity of 0.3%.

Date: 2017
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DOI: 10.1038/s41467-017-01902-9

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