© 2017 Elsevier B.V. The 5d-4f luminescence spectra in the LiYF4:Ce3+, LiLuF4:Ce3+ crystals at zero temperature are simulated using a microscopic model of electron-phonon interaction and realistic phonon spectrum of host ...

In the framework of nonequilibrium statistical operator, the equations are derived for number of phonons, photons and collective population difference, describing the process of laser cooling for solids. With the use of ...

Detailed calculations have been performed of multiphonon relaxation rates of optical excitations in Nd-doped LiYF4 and Pr-doped CsCdBr3 crystals in the frameworks of the exchange charge model of the crystal fields and rigid ...