Subkelvin Parametric Feedback Cooling of a Laser-Trapped Nanoparticle

Gieseler, Jan; Deutsch, Bradley; Quidant, Romain; Novotny, Lukas

doi:10.1103/physrevlett.109.103603

Cited by 584 publications

(760 citation statements)

References 31 publications

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“…The method is also compatible with non-conservative force field imaging and will permit further exploration of fluctuation theorems in 2D. Finally, our 2D analysis can also be transposed to 3D, using 3D angular and spectral analysis with for instance trapped ions [42] or levitated nano-particles [43,44].…”

Section: Conclusion-mentioning

confidence: 98%

A universal and ultrasensitive vectorial nanomechanical sensor for imaging 2D force fields

et al. 2016

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Miniaturization of force probes into nanomechanical oscillators enables ultrasensitive investigations of forces on dimensions smaller than their characteristic length scale. Meanwhile it also unravels the force field vectorial character and how its topology impacts the measurement. Here we expose an ultrasensitive method to image 2D vectorial force fields by optomechanically following the bidimensional Brownian motion of a singly clamped nanowire. This novel approach relies on angular and spectral tomography of its quasi frequency-degenerated transverse mechanical polarizations: immersing the nanoresonator in a vectorial force field does not only shift its eigenfrequencies but also rotate eigenmodes orientation as a nano-compass. This universal method is employed to map a tunable electrostatic force field whose spatial gradients can even take precedence over the intrinsic nanowire properties. Enabling vectorial force fields imaging with demonstrated sensitivities of attonewton variations over the nanoprobe Brownian trajectory will have strong impact on scientific exploration at the nanoscale.Introduction-Nanosciences were revolutionized by the invention of atomic force microscopy [1] which enabled first perceptions of the nanoworld, by measuring proximity forces exerted by a sample on a micromechanical oscillator. The subsequent emergence of nanomechanical oscillators and evolutions in readout techniques [2][3][4] lead to impressive improvements in force sensitivity [5], enabling detection of collective spin dynamics [6][7][8], single electron spin [9], mass sensing of atoms [10,11] or inertial sensing [12]. Attractive perspectives arise too when nanoresonators are hybridized to single quantum systems, such as molecular magnets [13], spin or solid states qubits [14][15][16][17]. This reduction of the probe size naturally motivates the exploration of force fields on dimensions smaller than their characteristic length scale where a great physical richness is expected, in particular for nanoscale imaging or investigations of fundamental interactions such as proximity forces or near field couplings. In this situation, measurements are performed in presence of strong force field gradients whose vectorial structure becomes crucially relevant and should be fully accounted to describe the measurement process itself [18].

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Section: Conclusion-mentioning

confidence: 98%

A universal and ultrasensitive vectorial nanomechanical sensor for imaging 2D force fields

et al. 2016

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“…A future strategy to improve the apparent Q at 300 K is to tune b with the gate voltage in order to compensate the spectral broadening due to symmetry breaking with that due to the Duffing nonlinearity. Symmetry breaking is important for other vibrational systems of current interest, such as graphene resonators 10,27-31 and levitating particles [32][33][34] . Our new technique may help to reveal this effect in such systems.…”

Section: Discussionmentioning

confidence: 99%

Symmetry breaking in a mechanical resonator made from a carbon nanotube

et al. 2013

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Nanotubes behave as semi-flexible polymers in that they can bend by a sizeable amount. When integrating a nanotube in a mechanical resonator, the bending is expected to break the symmetry of the restoring potential. Here we report on a new detection method that allows us to demonstrate such symmetry breaking. The method probes the motion of the nanotube resonator at nearly zero-frequency; this motion is the low-frequency counterpart of the second overtone of resonantly excited vibrations. We find that symmetry breaking leads to the spectral broadening of mechanical resonances, and to an apparent quality factor that drops below 100 at room temperature. The low quality factor at room temperature is a striking feature of nanotube resonators whose origin has remained elusive for many years. Our results shed light on the role played by symmetry breaking in the mechanics of nanotube resonators.

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“…Chirality-controlled optical trapping and manipulation can be exploited to address novel strategies for optomechanics experiments and optical sorting 49 . Furthermore, spin-dependent optical forces pave the way to novel methodologies for optical cooling and trapping based on the coupling of translational and rotational degrees of freedom towards the quantum mechanical motional ground states of levitated particles 12,[50][51][52] . For L-chiral microparticles, the centre-of-mass and rotations could be actively laser cooled in a s þ s þ counter-propagating beams configuration.…”

Section: Discussionmentioning

confidence: 99%

Polarization-dependent optomechanics mediated by chiral microresonators

et al. 2014

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Chirality is one of the most prominent and intriguing aspects of nature, from spiral galaxies down to aminoacids. Despite the wide range of living and non-living, natural and artificial chiral systems at different scales, the origin of chirality-induced phenomena is often puzzling. Here we assess the onset of chiral optomechanics, exploiting the control of the interaction between chiral entities. We perform an experimental and theoretical investigation of the simultaneous optical trapping and rotation of spherulite-like chiral microparticles. Due to their shell structure (Bragg dielectric resonator), the microparticles function as omnidirectional chiral mirrors yielding highly polarization-dependent optomechanical effects. The coupling of linear and angular momentum, mediated by the optical polarization and the microparticles chiral reflectance, allows for fine tuning of chirality-induced optical forces and torques. This offers tools for optomechanics, optical sorting and sensing and optofluidics.

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Subkelvin Parametric Feedback Cooling of a Laser-Trapped Nanoparticle

Cited by 584 publications

References 31 publications

A universal and ultrasensitive vectorial nanomechanical sensor for imaging 2D force fields

A universal and ultrasensitive vectorial nanomechanical sensor for imaging 2D force fields

Symmetry breaking in a mechanical resonator made from a carbon nanotube

Polarization-dependent optomechanics mediated by chiral microresonators

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