Open AccessNonlinear properties of upconversion YVO4:Yb3+, Er3+ nanoparticles
Author(s) -
В. Г. Никифоров
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 - 10.1088/1742-6596/1890/1/012007
Subject(s) - photon upconversion , metastability , saturation (graph theory) , laser , nonlinear system , materials science , nanoparticle , ion , analytical chemistry (journal) , emission intensity , atomic physics , intensity (physics) , optics , physics , chemistry , nanotechnology , mathematics , chromatography , combinatorics , quantum mechanics
Nonlinear character of upconversion processes can be revealed via a measurement of power dependent steady-state emission intensity depicted in the ln-ln plot, where a slope indicates the degree of nonlinearity. As a rule observed values of the slope for YVO 4 : Yb, Er nanoparticles are less than 2 that interprets as a saturation effect due to high pump laser intensity. Here we based on a numerical analysis show that a life time of the Er 3 + ion metastable state 4 I 11/2 is also responsible for deviation of the slope from 2 even in the case when Yb 3+ -Er 3+ upconversion system is far away from saturation mode.