Nonequilibrium dynamics induced by scattering forces for optically trapped nanoparticles in strongly inertial regimes

0504932 - FZÚ 2020 RIV US eng J - Článek v odborném periodiku
Amarouchene, Y. - Mangeat, M. - Montes, B.V. - Ondič, Lukáš - Guerin, T. - Dean, D.S. - Louyer, Y.
Nonequilibrium dynamics induced by scattering forces for optically trapped nanoparticles in strongly inertial regimes.
Physical Review Letters. Roč. 122, č. 18 (2019), s. 1-6, č. článku 183901. ISSN 0031-9007. E-ISSN 1079-7114
Institucionální podpora: RVO:68378271
Klíčová slova: optical trapping * tweezers * non-equilibrium dynamics
Obor OECD: Condensed matter physics (including formerly solid state physics, supercond.)
Impakt faktor: 8.385, rok: 2019
Způsob publikování: Omezený přístup
https://doi.org/10.1103/physrevlett.122.183901

The forces acting on optically trapped particles are commonly assumed to be conservative. Nonconservative scattering forces induce toroidal currents in overdamped liquid environments, with negligible effects on position fluctuations. However, their impact in the underdamped regime remains unexplored. Here, we study the effect of nonconservative scattering forces on the underdamped nonlinear dynamics of trapped nanoparticles at various air pressures. These forces induce significant low-frequency position fluctuations along the optical axis and the emergence of toroidal currents in both position and velocity variables. Our experimental and theoretical results provide fundamental insights into the functioning of optical tweezers and a means for investigating nonequilibrium steady states induced by nonconservative forces.

Trvalý link: http://hdl.handle.net/11104/0296477