Non-invasive and ultra-accurate optical manipulation of nanometer objects has recently gained a growing interest as powerful enabling tool in nanotechnology biophysics. In this context, Self-Induced Back-Action (SIBA) trapping nano-optical cavities shown unique potential for manipulating nanometer-sized under low intensities. Yet, the existence SIBA effect that far only been evidenced indirectly through its enhanced performances. article we present first time direct experimental evidence...

All three motional modes of a charged dielectric nanoparticle in Paul trap are cooled by direct feedback to temperatures few mK. We test two methods, one based on electrical forces and the other optical forces; for both we find similar cooling efficiencies. Cooling is characterized as function parameters, background pressure, particle's position.

Accurate delivery of small targets in high vacuum is a pivotal task many branches science and technology. Beyond the different strategies developed for atoms, proteins, macroscopic clusters, pellets, manipulation neutral particles over distances still poses formidable challenge. Here, we report an approach based on mobile optical trap operated under feedback control that enables cooling long range 3D silica nanoparticle vacuum. We apply this technique to load single into high-finesse cavity...

Mechanical oscillators based on levitated particles are promising candidates for sensitive detectors and platforms testing fundamental physics. The targeted quality factors such correspond to extremely low damping rates of the center-of-mass motion, which can only be obtained if trapped in ultrahigh vacuum (UHV). In order reach pressures, a noncontaminating method loading UHV environment is necessary. However, particle traps at pressures below viscous flow regime challenging due conservative...

We investigate the influence of laser phase noise heating on resolved sideband cooling in context center-of-mass motion a levitated nanoparticle high-finesse cavity. Although is not fundamental physical constraint, regime where it becomes main limitation Levitodynamics has so far been unexplored and hence embodies from this point forward obstacle reaching motional ground state mesoscopic objects with cooling. reach minimal temperatures comparable to ${T}_{\mathrm{min}}=10\text{ }\text{...

We investigate the dynamics of single microparticles immersed in water that are driven out equilibrium presence an additional external colored noise. As a case study, we trap polystyrene particle with optical tweezers and apply electric field flat spectrum but finite bandwidth order kHz. The intensity noise controls amplitude fluctuations position therefore its effective temperature. Here show, two different nonequilibrium experiments, work done on obey Crooks fluctuation theorem at...

We investigate the instabilities of a linear damped oscillator due to fluctuations damping parameter. The are driven either by Gaussian white noise or Poisson (white shot noise). consider three notions stability. first two well-known stability in mean and square. introduce concept thermodynamic stability, corresponding nonpositive rate energy dissipation at all times. derive analytical results for various instability thresholds, confirm validity our approach numerical simulations, obtain...

Living cells have spatially localized charged groups such as nucleus, cell walls, and others that can move in an external electric field providing the electrophoretic mobility (EPM). We suggest to monitor EPM of a single living during its growth using optical tweezers combined with position detector. As example, we studied yeast growth, observed nonmonotonic behavior cycle, maximal was at initial stage strongly reducing when cycle is near final stage.

Levitated particles are unique among optomechanical systems in that they benefit from the absence of physical contact with external environment. Recently, a new research direction known as levitated optomechanics has attracted interest numerous groups, major focus on optically suspended particles. In contrast to optical trapping experiments, we levitate charged silica nanospheres high vacuum by means Paul trap. This method provides deeper confining potential than traps and enables opaque...

Stochastic thermodynamics [1,2] is a recently developed framework to deal with the at microscope, where thermal fluctuations strongly influence their behaviour. Typical such systems are colloids and biomolecules or cells. These do not only lead Brownian motion, but continuous unavoidable heat exchange between suspending medium particles, leading very interesting phenomenology. In order explore phenomenology test theoretical results obtained from stochastic thermodynamics, we an "experimental...

First Page

In this talk we first introduce the use of a levitated nanoparticle in vacuum as nano-optomechanical system with unprecedented performances. Subsequently, focus on our efforts cooling its motion towards mechanical ground state at room temperature. particular, present an experiment that combines active parametric feedback passive resolved side band cooling. We demonstrate systematic transfer single trapped from load lock to main chamber hosting high-finesse optical cavity and report latest advances

Non-invasive and ultra-accurate optical manipulation of nanometer objects has recently gained a growing interest as powerful enabling tool in nanotechnology biophysics. In this context, Self-Induced Back-Action (SIBA) trapping nano-optical cavities shown unique potential for manipulating nanometer-sized under low intensities. Yet, the existence SIBA effect so far only been evidenced indirectly by its enhanced performances. article we present first time direct experimental evidence...

The field of levitated optomechanics studies the interaction between light and mechanical motion mesoscopic objects that are suspended by means magnetic, optical, or electrodynamic traps. lack a clamping structure drastically reduces thermal coupling with environment, making these physical systems particularly suitable as ultrasensitive force detectors test bench for quantum mechanics in new regimes. In our experiment, we use Paul trap to levitate charged glass sphere is 300 nm diameter. We...