Rahman, ATMA;
Barker, PF;
(2017)
Laser refrigeration, alignment and rotation of levitated Yb3+:YLF nanocrystals.
Nature Photonics
, 11
(10)
pp. 634-638.
10.1038/s41566-017-0005-3.
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Abstract
The ability to cool and manipulate levitated nanoparticles in vacuum is a promising tool for exploring macroscopic quantum mechanics1,2, precision measurements of forces3 and non-equilibrium thermodynamics4,5. The extreme isolation afforded by optical levitation offers a low-noise, undamped environment that has been used to measure zeptonewton forces3 and radiation pressure shot noise6, and to demonstrate centre-of-mass motion cooling7,8. Ground-state cooling and the creation of macroscopic quantum superpositions are now within reach, but control of both the centre of mass and internal temperature is required. While cooling the centre-of-mass motion to micro-kelvin temperatures has now been achieved, the internal temperature has remained at or above room temperature. Here, we realize a nanocryostat by refrigerating levitated Yb3+:YLF nanocrystals to 130 K using anti-Stokes fluorescence cooling, while simultaneously using the optical trapping field to align the crystal to maximize cooling.
| Type: | Article |
|---|---|
| Title: | Laser refrigeration, alignment and rotation of levitated Yb3+:YLF nanocrystals |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1038/s41566-017-0005-3 |
| Publisher version: | http://doi.org/10.1038/s41566-017-0005-3 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Physics and Astronomy |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10064662 |
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