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Er3+-Tm3+ codoped amorphous Al2O3 thin films were synthesized using pulsed laser deposition and their photoluminescence (PL) properties were investigated. The infrared fluorescence was improved by post-annealing and a broadband emission was obtained. Three cross relaxation channels between Er3+-Tm3+ and Tm-Tm ions were observed for the films with annealing temperature increased from 800 to 850??C,...
ErTm codoped amorphous aluminum oxide (a-Al 2 O 3 ) thin films have been prepared by pulsed laser deposition. Efficient photoluminescence (PL) in the region of 1400–1700 nm with two peaks centered at 1533 nm and 1620 nm were observed with pumping at the wavelength of 791 nm. The PL performance has been investigated as a function of annealing temperature, which was varied from 650 to...
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