Growth of highly pure fluoride crystals for laser cooling

Hiroki Tanaka; Stefan Püschel; Felix Mauerhoff; Sascha Kalusniak; Christian Kränkel

doi:10.1117/12.2611505

9 March 2022 Growth of highly pure fluoride crystals for laser cooling

Hiroki Tanaka, Stefan Püschel, Felix Mauerhoff, Sascha Kalusniak, Christian Kränkel

Proceedings Volume PC12018, Photonic Heat Engines: Science and Applications IV; PC1201801 (2022) https://doi.org/10.1117/12.2611505
Event: SPIE OPTO, 2022, San Francisco, California, United States

Abstract

Crystalline materials with suppressed impurity concentrations are essential elements for efficient solid-state laser cooling based on anti-Stokes fluorescence. So far, fluoride single crystals doped with rare earth ions have been demonstrated as efficient laser cooling media. We report on our growth activities on high purity rare-earth-doped fluoride single crystals for this specific application. We grew a variety of fluoride crystals doped with ytterbium by the Czochralski method. These crystals are studied by temperature-dependent spectroscopy to fully reveal their potential as laser cooling media. The cooling efficiency of the grown crystals is directly evaluated in a laser-induced cooling setup in vacuo.

Conference Presentation

Citation Download Citation

Hiroki Tanaka, Stefan Püschel, Felix Mauerhoff, Sascha Kalusniak, and Christian Kränkel "Growth of highly pure fluoride crystals for laser cooling", Proc. SPIE PC12018, Photonic Heat Engines: Science and Applications IV, PC1201801 (9 March 2022); https://doi.org/10.1117/12.2611505

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