Scanning force sensing at micrometer distances from a conductive surface with nanospheres in an optical lattice

Montoya, Cris; Alejandro, Eduardo; Eom, William; Grass, Daniel H.; Clarisse, Nicolas; Witherspoon, Apryl; Geraci, Andrew

doi:10.1364/ao.457148

Cited by 11 publications

(5 citation statements)

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“…This corresponds to a linear velocity of 1.4 km s –1 between the tip of the nanodumbbell and the sapphire surface, separated by 430 nm. While a nanosphere has been levitated near a surface before, ,, to the best of our knowledge, this is the first report on optical levitation and GHz rotation of a nonspherical nanoparticle near a surface. Such a levitated GHz nanorotor near a surface can be used to explore fundamental physics, including measuring quantum friction. , …”

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confidence: 90%

“…Recently, quantum ground state cooling of the center-of-mass (CoM) motion of an optically levitated nanosphere in a vacuum was achieved, , showing the great potential of levitated nanoparticles for studying macroscopic quantum mechanics . Meanwhile, levitated dielectric particles in vacuum are ultrasensitive force detectors, and their CoM motion has been proposed to detect short-range forces, − dark matter, dark energy, high-frequency gravitational waves, and quantum gravity . Besides the CoM motion, there is increasing interest in the torsional − and rotational motions − of nonspherical particles. − Levitated nonspherical nanoparticles in free space have been driven to rotate at GHz frequencies , and cooled by active feedback, , coherent scattering, and spin-optomechanical interaction .…”

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confidence: 99%

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Near-Field GHz Rotation and Sensing with an Optically Levitated Nanodumbbell

Ju,

Jin,

Shen

et al. 2023

Nano Lett.

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A levitated nonspherical nanoparticle in a vacuum is ideal for studying quantum rotations and is an ultrasensitive torque detector for probing fundamental particle−surface interactions. Here, we optically levitate a silica nanodumbbell in a vacuum at 430 nm away from a sapphire surface and drive it to rotate at GHz frequencies. The relative linear speed between the tip of the nanodumbbell and the surface reaches 1.4 km s −1 at a submicrometer separation. The rotating nanodumbbell near the surface demonstrates a torque sensitivity of (5.0 ± 1.1) × 10 −26 N m Hz −1/2 at room temperature. Moreover, we probed the near-field laser intensity distribution beyond the optical diffraction limit with a nanodumbbell levitated near a nanograting. Our numerical simulations show that the system can measure the Casimir torque and will improve the detection limit of non-Newtonian gravity by several orders of magnitude.

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confidence: 90%

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confidence: 99%

Near-Field GHz Rotation and Sensing with an Optically Levitated Nanodumbbell

Ju,

Jin,

Shen

et al. 2023

Nano Lett.

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“…The field of levitated optomechanics is both rapidly developing and of high scientific interest, with a number of impressive recent results including achieving cooling to the quantum ground state [1,2], high resolution surface force mapping [3][4][5], material limited GHz rotations [6], microscopic material studies [7], and high precision force [8] and acceleration [9] sensitivity. Near term goals include contributions to dark matter and energy searches [10] and astrophysics, including searches for high frequency gravitational waves (GWs) in the Leviated Sensor Detector (LSD), currently under construction [11].…”

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confidence: 99%

Optical Trapping of High-Aspect-Ratio NaYF Hexagonal Prisms for kHz-MHz Gravitational Wave Detectors

Winstone

Wang²,

Klomp³

et al. 2022

Phys. Rev. Lett.

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We present experimental results on optical trapping of Yb-doped β−NaYF sub-wavelengththickness high-aspect-ratio hexagonal prisms with a micron-scale radius. The prisms are trapped in vacuum using an optical standing wave, with the normal vector to their face oriented along the beam propagation direction, yielding much higher trapping frequencies than those typically achieved with microspheres of similar mass. This plate-like geometry simultaneously enables trapping with low photon-recoil-heating, high mass, and high trap frequency, potentially leading to advances in high frequency gravitational wave searches in the Levitated Sensor Detector, currently under construction. The material used here has previously been shown to exhibit internal cooling via laser refrigeration when optically trapped and illuminated with light of suitable wavelength. Employing such laser refrigeration methods in the context of our work may enable higher trapping intensity and thus higher trap frequencies for gravitational wave searches approaching the several hundred kHz range.

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“…This shaking releases nano particles that can be trapped. Piezo launching has been widely used to trap particles ranging from 170nm to 3µm in diameter [110][111][112] as well as clumps of particles [113]. It Chapter 5 Shaun J. Laing has been demonstrated that this method works in vacuum down to pressures of 0.6mbar.…”

Section: A Single Source Talbot Interferometermentioning

confidence: 99%

Bayesian Inference and Collapse Models in Levitated Optomechanics

Laing

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An apparent contradiction exists between the wave nature of quantum mechanics allowing for superposition of states, and the observations of classical mechanics. Several possible solutions for this discrepancy have been suggested including the proposal that quantum and classical dynamics are simply approximations to a universal dynamics. Collapse models modify the usual Schrödinger equation that provides this universal dynamics and can be tested experimentally. In this thesis, we conceive of a Talbot matter-wave interferometer to probe the superposition of high-mass nanoparticles. We extend existing descriptions beyond the point-like regime allowing us to test collapse models with masses up to 109u. During this development, we discover and correct an error in calculating the Talbot coeﬃcients for a laser grating in the Mie regime. A Bayesian analysis is performed on simulated data making greater use of each recorded arrival position of the nanoparticle and provide a real-valued probability density to the parameter space as opposed to the binary exclusion plots of previous works. We ﬁnd a limit to the size of spherical particles that can be used as a result of the grating transformation being averaged over the particle. As a result, during a collaboration with the Geraci group at Northwestern University, we develop a numerical method for ﬁnding where arbitrarily shaped particles scatter information about their position and use these techniques to derive the Talbot coeﬃcients for arbitrary particle geometries.

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Scanning force sensing at micrometer distances from a conductive surface with nanospheres in an optical lattice

Cited by 11 publications

References 50 publications

Near-Field GHz Rotation and Sensing with an Optically Levitated Nanodumbbell

Near-Field GHz Rotation and Sensing with an Optically Levitated Nanodumbbell

Optical Trapping of High-Aspect-Ratio NaYF Hexagonal Prisms for kHz-MHz Gravitational Wave Detectors

Bayesian Inference and Collapse Models in Levitated Optomechanics

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