We measure the minimum achievable temperature (MAT) as a function of excitation wavelength in anti-Stokes fluorescence cooling of high purity Yb3+-doped LiYF4 (Yb:YLF) crystal. Such measurements were obtained by developing a sensitive noncontact thermometry that is based on a two-band differential luminescence spectroscopy using balanced photo-detectors. These measurements are in excellent agreement with the prediction of the laser cooling model and identify MAT of 110 K at 1020 nm, corresponding to E4–E5 Stark manifold transition in Yb:YLF crystal.
|Autori:||Denis V. Seletskiy; Seth D. Melgaard; Richard I. Epstein; Di Lieto A; Mauro Tonelli; Mansoor Sheik-Bahae|
|Titolo:||Precise determination of minimum achievable temperature for solid-state optical refrigeration|
|Anno del prodotto:||2013|
|Digital Object Identifier (DOI):||10.1016/j.jlumin.2011.09.045|
|Appare nelle tipologie:||1.1 Articolo in rivista|