Lasing in Al2O3 color centers at room temperature in the visible

Microscopic origin of the optical processes in blue sapphire

“…Sapphire is a widely used industrial material for applications such as lasers, catalyst supports, and as substrate layers in photovoltaic devices. [1][2][3] Pure corundum (a-Al 2 O 3 ) is a ceramic, physically tough, transparent material. With the presence of iron and titanium chemical impurities, corundum crystals become vibrant blue sapphires.…”

Luminescence of color centers formed in alkali-earth-doped yttrium orthoaluminate crystals

“…Color center emission in oxides can supply many new materials for applications such as phosphors, scintillators and solid-state lasers. There have been several reports on the lasing performance of color centers in oxides, however it seems to be difficult to reproduce the results [18,19]. When many kinds of crystals developed by this method are available, it will help the research of optimized materials for broad band tunable solid-state lasers based on the color center levels with large oscillator strength.…”

Spatial modulation phenomena in lasing media and saturable absorbers based on color centers crystals

“…As initial equations we will use the dynamic equation for the dipole moment of absorbing centers 2 2 2Q * </> + -</> + Q <> -j-(Ol 1 P2z) (u ) E, L 2 (1) --(p11 -p22)+'" (Ph P22)t_2<>E (2) at T1 hQ ' the equations are close to those obtained in Ref. 7 for two-level quantum systems, interacting with each other, with radiation and with thermostat.…”