Solid-state laser refrigeration of a composite semiconductor Yb:YLiF4 optomechanical resonator

Anupum Pant, Xiaojing Xia, E. James Davis and Peter J. Pauzauskie ()
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Anupum Pant: University of Washington
Xiaojing Xia: University of Washington
E. James Davis: University of Washington
Peter J. Pauzauskie: University of Washington

Nature Communications, 2020, vol. 11, issue 1, 1-7

Abstract: 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.

Date: 2020
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DOI: 10.1038/s41467-020-16472-6

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