# Nonequilibrium Dynamics Induced by Scattering Forces for Optically Trapped Nanoparticles in Strongly Inertial Regimes.

@article{Amarouchene2018NonequilibriumDI, title={Nonequilibrium Dynamics Induced by Scattering Forces for Optically Trapped Nanoparticles in Strongly Inertial Regimes.}, author={Yacine Amarouchene and Matthieu Mangeat and Benjamin Vidal Montes and Luk{\'a}{\vs} Ondi{\vc} and Thomas Guerin and D. Dean and Yann Louyer}, journal={Physical review letters}, year={2018}, volume={122 18}, pages={ 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…

## 14 Citations

### Role of nonconservative scattering forces and damping on Brownian particles in optical traps.

- PhysicsPhysical review. E
- 2019

We consider a model of a particle trapped in a harmonic optical trap but with the addition of a nonconservative radiation induced force. This model is known to correctly describe experimentally…

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This technique provides us with the parameters of a levitated nanoparticle such as eigenfrequency, damping, coefficient of nonlinearity and effective temperature directly from the recorded transient particle motion without any need for external driving or modification of an experimental system.

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Brownian motion in confinement and at interfaces is a canonical situation, encountered from fundamental biophysics to nanoscale engineering. Using the Lorenz-Mie framework, we optically record the…

### Path integrals and nonlinear optical tweezers

- Physics
- 2021

We use path integrals to calculate perturbative corrections to the correlation function of a particle under the action of nonlinear optical tweezers, both in the overdamped and underdamped regimes.…

### Suppressing Frequency Fluctuations of Self-Sustained Vibrations in Underdamped Nonlinear Resonators

- Physics
- 2020

We consider frequency fluctuations in self-sustained oscillators based on nonlinear underdamped resonators. An important type of such resonators are nano- and micro-electro-mechanical systems.…

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We present an experimental realization of a biased optical periodic potential in the low friction limit. The noise-induced bistability between locked (torsional) and running (spinning) states in the…

### Surface Force Measurements Using Brownian Particles

- Physics
- 2020

Brownian motion in confinement and at interfaces is a canonical situation, encountered from fundamental biophysics to nanoscale engineering. Using the Lorenz-Mie framework, we optically record the…

### Active velocity processes with suprathermal stationary distributions and long-time tails.

- PhysicsPhysical review. E
- 2020

The result is a unifying framework for the emergence of heavy tails in the velocity distribution, relevant for understanding the power-law decay in the electron velocity distribution of space plasma or more generally for explaining non-Maxwellian behavior of driven gases.

### Drag forces on nanoparticles in the free-molecule regime: Effect of the particle temperature.

- PhysicsPhysical review. E
- 2020

Based on the kinetic theory, the generalized formulas for the drag force on nanoparticles in the free-molecule regime are obtained and it is found that there exists a significant error induced by the assumption of equal temperature between the particle and the surrounding gas.

### On the microscopic response of equilibrium systems to dissipative perturbations

- Physics
- 2022

The standard relationships of statistical mechanics are upended my the presence of active forces. In particular, it is no longer possible to simply write down what the stationary probability of a…

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