Optical levitation of a microdroplet containing a single quantum dot

Minowa, Yosuke; Kawai, Ryoichi; Ashida, Masaaki

doi:10.1364/ol.40.000906

Cited by 17 publications

(12 citation statements)

References 31 publications

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“…A major issue in nanoparticle optical trapping is preparing slow nanoparticles near the focal point. In particular, cryogenic conditions prohibit the use of the standard procedures such as the "go and pick" scheme (5) or using aerosols (27) to prepare nanoparticles. In this study, we utilize the laser ablation technique to load the nanoparticles.…”

Section: Particle Loadingmentioning

confidence: 99%

Optical trapping of nanoparticles in superfluid helium

Minowa,

Geng,

Kokado

et al. 2021

Preprint

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Optical tweezers, the three-dimensional confinement of a nanoparticle by a strongly focused beam of light, have been widely employed in investigating biomaterial nanomechanics, nanoscopic fluid properties, and ultrasensitive detections in various environments such as inside living cells, at gigapascal pressure, and under high vacuum. However, the cryogenic operation of solidstate-particle optical tweezers is poorly understood. In this study, we demonstrate the optical trapping of metallic and dielectric nanoparticles in superfluid helium below 2 K, which is two orders of magnitude lower than in the previous experiments. We prepare the nanoparticles via in-situ laser ablation.The nanoparticles are stably trapped with a single laser beam tightly focused in the superfluid helium. Our method provides a new approach for studying nanoscopic quantum hydrodynamic effects and interactions between quantum fluids and classical objects.Teaser Optical tweezers can grab nanoparticles at extremely low temperature (1.4 K), show-1

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Section: Particle Loadingmentioning

confidence: 99%

Optical trapping of nanoparticles in superfluid helium

Minowa,

Geng,

Kokado

et al. 2021

Preprint

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“…[8,11,29]. The DR particles are dispersed in toluene and diluted to a concentration of about 10 −9 mol/l.…”

Section: Experimental Realizationmentioning

confidence: 99%

Optical trapping of nanoparticles by full solid-angle focusing

Salakhutdinov

Sondermann

Carbone

et al. 2016

Optica

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Optical dipole-traps are used in various scientific fields, including classical optics, quantum optics and biophysics. Here, we propose and implement a dipole-trap for nanoparticles that is based on focusing from the full solid angle with a deep parabolic mirror. The key aspect is the generation of a linear-dipole mode which is predicted to provide a tight trapping potential. We demonstrate the trapping of rod-shaped nanoparticles and validate the trapping frequencies to be on the order of the expected ones. The described realization of an optical trap is applicable for various other kinds of solid-state targets. The obtained results demonstrate the feasibility of optical dipole-traps which simultaneously provide high trap stiffness and allow for efficient interaction of light and matter in free space.

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“…The two identical aspheric lenses (thorlabs, C240TME-B) focused the beams onto the same point, which leads to a cancelation of the scattering forces [7]. Silica microspheres were loaded into the trapping sight via an ultrasonic nebulizer (Omron, NE-U22) [17][18][19]. 100 µl of the stock solution was dried, redissolved in 15 ml ethanol, and was sonicated in an ultrasonic bath for 20 minutes before use.…”

Section: Methodsmentioning

confidence: 99%

“…Since it is impossible to levitate an exact predetermined particle with commonly used loading techniques [7,[17][18][19], in-situ modification of the particle size or refractive index is needed to tune the WGMs.…”

Section: Introductionmentioning

confidence: 99%

In situ tuning of whispering gallery modes of levitated silica microspheres

2017

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We demonstrated the tuning of whispering gallery modes (WGMs) of a silica microsphere during optical levitation through the annealing process. We determined the annealing temperature from the power balance between the CO2 laser light heating and several cooling processes. Cooling caused by heat conduction through the surrounding air molecules is the dominant process. We achieved a blue shift of the WGMs as large as 1 %, which was observed in the white-light scattering spectrum from the levitated microsphere.

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Optical levitation of a microdroplet containing a single quantum dot

Cited by 17 publications

References 31 publications

Optical trapping of nanoparticles in superfluid helium

Optical trapping of nanoparticles in superfluid helium

Optical trapping of nanoparticles by full solid-angle focusing

In situ tuning of whispering gallery modes of levitated silica microspheres

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