Spectra and Kinetics of Emission in Polycrystalline Er₂O₃ under Pulsed Laser-Thermal Excitation

Abstract—Kinetics of continual thermal emission spectra of Er₂O₃ polycrystals is experimentally studied at laser-thermal excitation by single submicrosecond CO₂ laser pulses at λ = 10.6 µm. The nature and kinetics of Er₂O₃ and other oxides are explained by the conversion of the thermal energy of the crystal lattice into continual Plank’s radiation. The results can be used for investigations of the energy balance of thermophotovoltaic electric converters with silicon, cascade, and hybrid photocells with laser-thermal and gas-flame heating of transparent pure and doped oxides up to melting temperatures as continual emitters.