Optical Characterization of Erbium Doped KY<sub>3</sub>F<sub>10</sub> Fluoride Single Crystals

Abstract

Preparation and optical characterisation of Erbium doped KY 3 F 10 single crystals are reported. The crystals were grown using the Czochralski pulling technique. The single phase was controlled by X-ray diffraction analysis. Room temperature optical spectra were recorded between 200 and 1600 nm. They were used to fit the three phenomenological Judd-Ofelt (JO) parameters Ω t (t = 2, 4, 6). The emission transition probabilities, branching ratios and radiative lifetimes are then deduced. The possibility to use such material for laser emissions is discussed.

Enhanced Red Upconversion Emission, Magnetoluminescent Behavior, and Bioimaging Application of NaSc0.75Er0.02Yb0.18Gd0.05F4@AuNPs Nanoparticles

“…Red–NIR radiation (excitation/emission) is not (or negligibly) absorbed by biological samples, increases penetration depth in tissues, and avoids problems of light scattering background, etc., and so are most preferred for imaging applications . These limitations have encouraged researchers to investigate other fluoride matrices, for example, LaF 3 , NaGdF 4 , NaLuF 4 , KY 3 F 10 , CaF 2 , NaLuF 4 , BaLuF 5 , KGdF 4 , NaScF 4 , etc., for the suitable emission in red–NIR region. − …”