Up-conversion enhancement in Er3+ doped TiO2 through plasmonic coupling: Experiments and finite-element modeling

被引：17

作者：

Johannsen, Sabrina R. ^{[1
]}

Madsen, Soren P. ^{[2
]}

Jeppesen, Bjarke R. ^{[3
]}

Nygaard, Jens V. ^{[2
]}

Julsgaard, Brian ^{[1
,3
]}

Balling, Peter ^{[1
,3
]}

Larsen, Arne Nylandsted ^{[1
,3
]}

机构：

[1] Aarhus Univ, Interdisciplinary Nanosci Ctr iNANO, DK-8000 Aarhus C, Denmark

[2] Aarhus Univ, Dept Engn, DK-8000 Aarhus C, Denmark

[3] Aarhus Univ, Dept Phys & Astron, DK-8000 Aarhus C, Denmark

来源：

APPLIED PHYSICS LETTERS | 2015年 / 106卷 / 05期

关键词：

INFRARED LIGHT; SOLAR-CELLS; NANOPARTICLES; FILMS;

D O I：

10.1063/1.4907415

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Silver nanoparticles, placed on top of an Er3+ doped TiO2 thin film, were investigated as a means of achieving enhanced up-conversion. Finite-element modeling was used to determine the nanoparticle dimensions (height and diameter) yielding the largest plasmonic enhancement for an incident light wavelength of 808 nm. In order to mimic the experimentally observed up-conversion enhancement, the electric-field enhancement from the Ag nanoparticles was integrated over the entire thickness of the thin film. Based on these calculations, four samples were prepared and tested. The trends predicted by the models were found to correlate well with the trends of the experimentally obtained plasmonic enhanced up-conversion yields. The largest plasmonic enhancement for 808 nm excitation was observed for Ag nanoparticles of diameter 91 +/- 5 nm and height 14 +/- 1 nm, yielding 163- and 51-fold enhancements for the green (525 nm and 550 nm) and red (660 nm) emissions peaks, respectively. (C) 2015 AIP Publishing LLC.

引用

页数：5

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