Irrera, A;
Magazzù, A;
Artoni, P;
Simpson, SH;
Hanna, S;
Jones, PH;
Priolo, F;
... Maragò, OM; + view all
(2016)
Photonic Torque Microscopy of the Nonconservative Force Field for Optically Trapped Silicon Nanowires.
Nano Letters
, 16
(7)
pp. 4181-4188.
10.1021/acs.nanolett.6b01059.
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Irrera et al 2016 Photonic Torque Microscopy of the Nonconservative Force Field for Optically Trapped Silicon Nanowires.pdf Download (5MB) | Preview |
Abstract
We measure, by photonic torque microscopy, the nonconservative rotational motion arising from the transverse components of the radiation pressure on optically trapped, ultrathin silicon nanowires. Unlike spherical particles, we find that nonconservative effects have a significant influence on the nanowire dynamics in the trap. We show that the extreme shape of the trapped nanowires yields a transverse component of the radiation pressure that results in an orbital rotation of the nanowire about the trap axis. We study the resulting motion as a function of optical power and nanowire length, discussing its size-scaling behavior. These shape-dependent nonconservative effects have implications for optical force calibration and optomechanics with levitated nonspherical particles.
| Type: | Article |
|---|---|
| Title: | Photonic Torque Microscopy of the Nonconservative Force Field for Optically Trapped Silicon Nanowires |
| Location: | United States |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1021/acs.nanolett.6b01059 |
| Publisher version: | http://dx.doi.org/10.1021/acs.nanolett.6b01059 |
| Language: | English |
| Additional information: | Copyright © 2016 American Chemical Society. This document is the Accepted Manuscript version of a Published Work that appeared in final form in Nano Letters, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see http://pubs.acs.org/doi/abs/10.1021/acs.nanolett.6b01059 |
| Keywords: | Brownian motion, Optical tweezers, nonequilibrium dynamics, silicon nanowires |
| 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 UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/1507864 |
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