Hydrothermal Synthesis of Yb3+: LuLiF4 Microcrystals and Laser Refrigeration of Yb3+: LuLiF4/Silicon‐Nitride Composite Nanostructures
The hydrothermal synthesis and characterization of 10%Yb3+:LiLuF4 (LLF) microcrystals are reported. A combination of X‐ray diffraction (XRD) analysis, analytical transmission electron microscopy (TEM), scanning TEM (STEM), energy‐dispersive X‐ray (EDX) spectroscopy), temperature‐dependent Fourier‐transform infrared (FTIR) spectroscopy, and photoluminescence (PL) measurements confirm a scheelite (I41/a) phase and substitutional doping of Yb3+ within the microcrystals. Laser cooling to more than 20 K below room temperature in vacuum (10−3 torr) is demonstrated when irradiating individual microcrystals using a near‐infrared pumping wavelength (λ = 1020nm) at a laser power of 40 mW (irradiance of 0.85 MW cm−2). The use of these microcrystals is further demonstrated for solid‐state laser refrigeration of an electron‐transparent silicon‐nitride (Si3N4) TEM window. A combination of internal luminescence thermometry, heat‐transfer modeling, and control measurements on lithographically patterned Si3N4 optical cavities is used to demonstrate successful bulk laser cooling of Si3N4 TEM windows by ≈15 K below room temperature, opening new opportunities for contactless in situ TEM refrigeration.
Citations by journals
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Applied Sciences (Switzerland)
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Applied Sciences (Switzerland)
3 publications, 23.08%
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Applied Physics Letters
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Applied Physics Letters
1 publication, 7.69%
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Optical Materials
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Optical Materials
1 publication, 7.69%
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Advances in Materials Science and Engineering
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Advances in Materials Science and Engineering
1 publication, 7.69%
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Journal of Materials Chemistry C
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Journal of Materials Chemistry C
1 publication, 7.69%
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Angewandte Chemie - International Edition
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Angewandte Chemie - International Edition
1 publication, 7.69%
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Angewandte Chemie
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Angewandte Chemie
1 publication, 7.69%
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ACS Photonics
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ACS Photonics
1 publication, 7.69%
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Photonics
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Photonics
1 publication, 7.69%
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Inorganic Materials
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Inorganic Materials
1 publication, 7.69%
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Advanced Optical Materials
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Advanced Optical Materials
1 publication, 7.69%
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Citations by publishers
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Multidisciplinary Digital Publishing Institute (MDPI)
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Multidisciplinary Digital Publishing Institute (MDPI)
4 publications, 30.77%
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Wiley
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Wiley
3 publications, 23.08%
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American Institute of Physics (AIP)
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American Institute of Physics (AIP)
1 publication, 7.69%
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Elsevier
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Elsevier
1 publication, 7.69%
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Hindawi Limited
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Hindawi Limited
1 publication, 7.69%
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Royal Society of Chemistry (RSC)
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Royal Society of Chemistry (RSC)
1 publication, 7.69%
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American Chemical Society (ACS)
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American Chemical Society (ACS)
1 publication, 7.69%
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Pleiades Publishing
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Pleiades Publishing
1 publication, 7.69%
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