| Autor: |
Lakhotiya, Harish, Nazir, Adnan, Madsen, Søren P., Christiansen, Jeppe, Eriksen, Emil, Vester-Petersen, Joakim, Johannsen, Sabrina R., Jeppesen, Bjarke Rolighed, Balling, Peter, Larsen, Arne Nylandsted, Julsgaard, Brian |
| Předmět: |
|
| Zdroj: |
Applied Physics Letters; 12/26/2016, Vol. 109 Issue 26, p263102-1-263102-5, 5p, 1 Diagram, 4 Graphs |
| Abstrakt: |
In this letter, we present a comparative experimental-simulation study of Au-nanodisc-enhanced upconversion of 1500 nm light in an Er3+ doped TiO2 thin film. The geometry of the Au nanodiscs was guided by finite-element simulations based on a single nanodisc in a finite computational domain and controlled experimentally using electron-beam lithography. The surface-plasmon resonances (SPRs) exhibited a well-known spectral red shift with increasing diameter, well explained by the model. However, an experimentally observed double-peak SPR, which resulted from interparticle interactions, was expectedly not captured by the single-particle model. At resonance, the model predicted a local-field enhancement of the upconversion yield, and experimentally, the luminescence measurements showed such enhancement up to nearly 7 fold from a nanodisc with 315nm diameter and 50nm height. The upconversion enhancement agreed qualitatively with the theoretical predictions, however with 3-5 times higher enhancement, which was attributed to scattered light from neighboring particles. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
|
