Polarization-dependent center-of-mass motion of an optically levitated nanosphere

Jin, Yuanbin; Yu, Xudong; Zhang, Jing

doi:10.1364/josab.36.002369

Cited by 10 publications

(13 citation statements)

References 48 publications

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“…The CoM motion of the particle in a strongly focused laser generally has three eigen frequencies in three directions due to the vector diffraction of the light [38]. In our experiment, the eigen frequency in x, y, z directions are about 210 kHz, 220 kHz, and 90 kHz, respectively.…”

Section: Resultsmentioning

confidence: 56%

6 GHz hyperfast rotation of an optically levitated nanoparticle in vacuum

Jin,

Yan,

Rahman

et al. 2020

Preprint

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We report an experimental observation of a record-breaking ultra-high rotation frequency about 6 GHz in an optically levitated nanosphere system. We optically trap a nanosphere in the gravity direction with a high numerical aperture objective lens, which shows significant advantages in compensating the influences of the scattering force and the photophoretic force on the trap, especially at intermediate pressures (about 100 Pa). This allows us to trap a nanoparticle from atmospheric to low pressure (10 −3 Pa) without using feedback cooling. We measure a highest rotation frequency about 4.3 GHz of the trapped nanosphere without feedback cooling and a 6 GHz rotation with feedback cooling, which is the fastest mechanical rotation ever reported to date. Our work provides useful guides for efficiently observing hyperfast rotation in the optical levitation system, and may find various applications such as in ultrasensitive torque detection, probing vacuum friction, and testing unconventional decoherence theories.

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Section: Resultsmentioning

confidence: 56%

6 GHz hyperfast rotation of an optically levitated nanoparticle in vacuum

Jin,

Yan,

Rahman

et al. 2020

Preprint

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“…This is because the polarizability of the nanoparticle along its longest size axis is the largest [26]. The trapping frequencies of the CoM motion depend on the polarization of the trapping laser [35]. The smaller radial trapping frequency is along the electric field of the linear polarized laser (x axis).…”

Section: (B) and (C)mentioning

confidence: 99%

On-demand assembly of optically-levitated nanoparticle arrays in vacuum

Yan¹,

Yu²,

Han³

et al. 2022

Preprint

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“…The frequency of one beam is shifted by a mount of 110 MHz using an acoustooptic modulator (AOM), and then it is combined with the other laser beam (the frequency is not shifted) on a PBS to avoid the interference of the two trapping beams. Then the two beams are tightly focused by a high NA objective lens (Nikon CF Plan 100X, NA=0.95) in the vacuum system [53,54]. The directivity of one beam is precisely controlled by a motor-driving mirror.…”

Section: Experimental Setup and Theoretical Analyzationmentioning

confidence: 99%

Interference of the scattered vector light fields from two optically levitated nanoparticles

Jin,

Yan,

Rahman

et al. 2022

Preprint

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Polarization-dependent center-of-mass motion of an optically levitated nanosphere

Cited by 10 publications

References 48 publications

6 GHz hyperfast rotation of an optically levitated nanoparticle in vacuum

6 GHz hyperfast rotation of an optically levitated nanoparticle in vacuum

On-demand assembly of optically-levitated nanoparticle arrays in vacuum

Interference of the scattered vector light fields from two optically levitated nanoparticles

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