1.
Opt Lett
; 39(13): 3710-3, 2014 Jul 01.
Artigo
em Inglês
| MEDLINE
| ID: mdl-24978717
RESUMO
We show that the upconversion emission spectra of Tm³âº and Yb³âº codoped ß-NaYF4-NaYF4 core-shell nanoparticles can be judiciously modified by means of plasmonic nanocavities. Our analysis indicates that more than a 30-fold increase in conversion efficiency to the UV spectral band can be expected by engineering the NIR absorption and the local density of states. The effect of the nanocavity on the resulting radiation patterns is discussed. Our results are exemplified in cylindrical cavity geometries.