Efficiency improvement of up-conversion process of plasmonic-enhanced Er-doped-NaYF4 nanoparticles under IR excitation
| Autor: | Effat Samir, Nader Shehata, Ishac Kandas, Sara A. Elrafei |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
business.industry Doping Energy conversion efficiency Physics::Optics Nanoparticle Quantum yield 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Atomic and Molecular Physics and Optics 0104 chemical sciences Optics Optoelectronics Spontaneous emission 0210 nano-technology business Luminescence Plasmon Visible spectrum |
| Zdroj: | Optics Express. 26:25492 |
| ISSN: | 1094-4087 |
| DOI: | 10.1364/oe.26.025492 |
| Popis: | The up-conversion process is extensively studied because of its wide variety of applications such as bioimaging, energy harvesting, and optical sensors. However, the optical conversion efficiency is still relatively low and needs to be improved. Therefore, this paper introduces a detailed study of improving the up-conversion emission efficiency through adding plasmonic metallic nanostructures to the up-conversion optical centers. Our idea is to couple the optical plasmonic resonance with the visible emission of the optical centers under IR excitation. The optical centers are erbium ions hosted by fluoride low-phonon environment. Our calculations consider most possible transitions that can occur between the optical centers; tri-valent erbium ions, through Judd-Ofelt analysis. In addition, the effect of changing some parametric values is discussed, such as irradiance, and multi-phonon relaxations, to show their optimum values which correspond to best quantum yield efficiency. By increasing the diameter of added gold nanoparticles (Au NPs), the probability of occupation has been increased, and consequently, both the luminescence and up-conversion efficiency have been increased. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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