Open AccessLaser refrigeration of optically levitated sodium yttrium fluoride nanocrystals
Author(s) -
Danika R. Luntz-Martin,
R. Greg Felsted,
Siamak Dadras,
Peter J. Pauzauskie,
A. Nick Vamivakas
Publication year - 2021
Publication title -
optics letters/optics index
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.524
H-Index - 272
eISSN - 1071-2763
pISSN - 0146-9592
DOI - 10.1364/ol.426334
Subject(s) - materials science , nanocrystal , laser cooling , ytterbium , refrigeration , yttrium , laser , photothermal therapy , optoelectronics , optics , doping , nanotechnology , oxide , thermodynamics , metallurgy , physics
Solid state laser refrigeration can cool optically levitated nanocrystals in an optical dipole trap, allowing for internal temperature control by mitigating photothermal heating. This work demonstrates cooling of ytterbium-doped cubic sodium yttrium fluoride nanocrystals to 252 K on average with the most effective crystal cooling to 241 K. The amount of cooling increases linearly with the intensity of the cooling laser and is dependent on the pressure of the gas surrounding the nanocrystal. Cooling optically levitated nanocrystals allows for crystals prone to heating to be studied at lower pressures than currently achievable and for temperature control and stabilization of trapped nanocrystals.