Upconversion cooling of Er-doped low-phonon fluorescent solids
García Adeva, Angel Javier
Balda de la Cruz, Rolindes
Fernández Rodríguez, Joaquín Manuel
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Physical Review B 79(3) : (2009) // Article 033110
We report on a novel mechanism for laser cooling of fluorescent solids based on infrared-to-visible upconversion often found in rare-earth-doped low-phonon materials. This type of optical cooling presents some advantages with regards to conventional anti-Stokes cooling. Among them, it allows to obtain cooling in a broader range of frequencies around the barycenter of the infrared emitting band.