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Solid-state optical refrigeration to sub-100 Kelvin regime

2016; Nature Portfolio; Volume: 6; Issue: 1 Linguagem: Inglês

10.1038/srep20380

2045-2322

Seth D. Melgaard, Alexander R. Albrecht, Markus P. Hehlen, Mansoor Sheik‐Bahae,

Solid State Laser Technologies

Since the first demonstration of net cooling twenty years ago, optical refrigeration of solids has progressed to outperform all other solid-state cooling processes. It has become the first and only solid-state refrigerator capable of reaching cryogenic temperatures, and now the first solid-state cooling below 100 K. Such substantial progress required a multi-disciplinary approach of pump laser absorption enhancement, material characterization and purification, and thermal management. Here we present the culmination of two decades of progress, the record cooling to ≈ 91 K from room temperature.