Hewak, D.W., Leonard, V.M. and Murugan, G.S.
Ions shine on - uses of rare earth ions.
Materials World, 20, (1), .
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Since the invention of the laser, an important and growing application of rare earth ions has been an active medium for light generation. Most rare earth ions provide fluorescence; when excited with a light source they emit at characteristic wavelengths according to their electronic energy levels and the properties of the host material. Among the fifteen rare earth elements, there are hundreds of possible emission bands from UV wavelengths to infrared.
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