Spectral, luminescence, and lasing properties of Nd3+ ions in systems utilizing GaCl3?SOCl2 and AlCl3?SOCl2 inorganic liquid media
An investigation is made of the absorption and luminescence spectra and of the decay kinetics of the 4F3/2 metastable level of the Nd3+ ion in the GaCl3–SOCl2 concentration series and in an AlCl3–SOCl2:Nd3+ sample at temperatures of 300, 77, and 4.2°K. It is established that in GaCl3–SOCl2 and AlCl3–SOCl2 systems the neodymium ions form several types of activator centers corresponding to different structures of the nearest coordination sphere of the neodymium ion, which is a complexing agent. The phenomenological Judd-Ofelt model is used to calculate the most important characteristics of the radiative transitions of the Nd3+ ion in a GaCl3–SOCl2–NdCl3 system. Lasing at 1.058μ with a threshold of 0.5 J/cm was obtained in a GaCl3–SOCl2 system.