Abstract:
:Photothermal heating represents a major constraint that limits the performance of many nanoscale optoelectronic and optomechanical devices including nanolasers, quantum optomechanical resonators, and integrated photonic circuits. Here, we demonstrate the direct laser refrigeration of a semiconductor optomechanical resonator >20 K below room temperature based on the emission of upconverted, anti-Stokes photoluminescence of trivalent ytterbium ions doped within a yttrium-lithium-fluoride (YLF) host crystal. Optically-refrigerating the lattice of a dielectric resonator has the potential to impact several fields including scanning probe microscopy, the sensing of weak forces, the measurement of atomic masses, and the development of radiation-balanced solid-state lasers. In addition, optically refrigerated resonators may be used in the future as a promising starting point to perform motional cooling for exploration of quantum effects at mesoscopic length scales, temperature control within integrated photonic devices, and solid-state laser refrigeration of quantum materials.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Pant A,Xia X,Davis EJ,Pauzauskie PJdoi
10.1038/s41467-020-16472-6subject
Has Abstractpub_date
2020-06-23 00:00:00pages
3235issue
1issn
2041-1723pii
10.1038/s41467-020-16472-6journal_volume
11pub_type
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