Materials for Optical Cryocoolers
نویسندگان
چکیده
Vibration free cooling of detectors to cryogenic temperatures is critical for many terrestrial, airborne, and space based instruments. Cooling of solids by anti Stokes fluorescence is an emerging refrigeration technology that is inherently vibration free and compact, and enables cooling of small loads to cryogenic temperatures. In this Highlight, advances in laser cooling of solids are discussed with a particular focus on the recent breakthrough laser cooling of Yb doped YLiF4 crystals to 114 K. The importance of the material structure, composition, and purity of laser cooling materials and their influence on the optical refrigerator device performance is emphasized.
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