Hempston, D;
Vovrosh, J;
Toros, M;
Winstone, G;
Rashid, M;
Ulbricht, H;
(2017)
Force sensing with an optically levitated charged nanoparticle.
Applied Physics Letters
, 111
(13)
, Article 133111. 10.1063/1.4993555.
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Abstract
Levitated optomechanics is showing potential for precise force measurements. Here, we report a case study to show experimentally the capacity of such a force sensor, using an electric field as a tool to detect a Coulomb force applied onto a levitated nanosphere. We experimentally observe the spatial displacement of up to 6.6 nm of the levitated nanosphere by imposing a DC field. We further apply an AC field and demonstrate resonant enhancement of force sensing when a driving frequency, xAC, and the frequency of the levitated mechanical oscillator, x0, converge. We directly measure a force of 3.0 6 1.5 10–20N with 10 s integration time, at a centre of mass temperature of 3 K and at a pressure of 1.6 10–5 mbar.
| Type: | Article |
|---|---|
| Title: | Force sensing with an optically levitated charged nanoparticle |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1063/1.4993555 |
| Publisher version: | http://doi.org/10.1063/1.4993555 |
| Language: | English |
| Additional information: | This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10066083 |
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