Analysis of upconversion nanoparticles as an active medium for upconversion light sources

A. Fedotov; D. Pominova; E. O. Orlovskaya; Yu. V. Orlovskii; T. Niemi; R. Gumenyuk

doi:10.1117/12.2507599

1 March 2019 Analysis of upconversion nanoparticles as an active medium for upconversion light sources

A. Fedotov, D. Pominova, E. O. Orlovskaya, Yu. V. Orlovskii, T. Niemi, R. Gumenyuk

Proceedings Volume 10914, Optical Components and Materials XVI; 109140R (2019) https://doi.org/10.1117/12.2507599
Event: SPIE OPTO, 2019, San Francisco, California, United States

Abstract

In the presented work, we investigated the optical and thermal stability of upconversion nanoparticles based on the three widely used matrices (NaYF₄, Y₂O₃, LaF₃). Analysis of the upconversion emission as a function of pump power density in a wide range revealed a multi-stage functional dependence. The stages of linear growing, saturation and degradation with both reversible and irreversible characters were discovered. For matrices of nanoparticles with low-temperature stability (NaYF₄), the dependence proves to be irreversible that could cause by a change in the structure and chemical composition of the matrix. Reversible dependence occurs in matrices with high-temperature stability (Y₂O₃ and LaF₃) and is caused by multiphonon nonradiative relaxation, which can be temperature-stimulated because of self-heating and low air-cooling of the crystal matrixes with low thermal conductivity.

Conference Presentation

Citation Download Citation

A. Fedotov, D. Pominova, E. O. Orlovskaya, Yu. V. Orlovskii, T. Niemi, and R. Gumenyuk "Analysis of upconversion nanoparticles as an active medium for upconversion light sources", Proc. SPIE 10914, Optical Components and Materials XVI, 109140R (1 March 2019); https://doi.org/10.1117/12.2507599

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