Open AccessFluorescence quantum efficiency of Ti3+:Al2O3 at cryogenic temperatures and excitation by laser diodes
Author(s) -
А. В. Грибанов,
G. N. Nikolaev,
М.А. Мосин,
D. V. Yakovin,
М. D. Yakovin
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/2067/1/012010
Subject(s) - excited state , fluorescence , quantum efficiency , sapphire , materials science , excitation , crystal (programming language) , atmospheric temperature range , laser , analytical chemistry (journal) , luminescence , radiation , diode , range (aeronautics) , titanium , atomic physics , optoelectronics , optics , chemistry , physics , quantum mechanics , chromatography , meteorology , computer science , composite material , programming language , metallurgy
In this work the temperature dependences of the fluorescence of a titanium-sapphire crystal excited by radiation with λ=507 nm, λ=454 nm and λ=405 nm are measured. The quantum efficiency of fluorescence is determined. It was found for the first time that the quantum efficiency of fluorescence exceeds 100% in the cryogenic temperature range when the crystal is excited by radiation with λ = 454 nm. It is equal to (117 ± 5) % and (114 ± 5) % at T = 77 K for crystals grown by the Czochralski method and by gradient of temperature one, respectively.