Ultrasensitive polarized up-conversion of Tm3+-Yb3+ doped β-NaYF<inf>4</inf> single nanorod

Publisher:
American Chemical Society
Publication Type:
Journal Article
Citation:
Nano Letters, 2013, 13 (5), pp. 2241 - 2246
Issue Date:
2013-04-23
Full metadata record
Files in This Item:
Filename Description Size
Ultrasensitive Polarized Up-Conversion of Tm3+−Yb3+ Doped β‑NaYF4.pdfPublished Version4.34 MB
Adobe PDF
Up-conversion luminescence in rare earth ions (REs) doped nanoparticles has attracted considerable research attention for the promising applications in solid-state lasers, three-dimensional displays, solar cells, biological imaging, and so forth. However, there have been no reports on REs doped nanoparticles to investigate their polarized energy transfer up-conversion, especially for single particle. Herein, the polarized energy transfer up-conversion from REs doped fluoride nanorods is demonstrated in a single particle spectroscopy mode for the first time. Unique luminescent phenomena, for example, sharp energy level split and singlet-to-triplet transitions at room temperature, multiple discrete luminescence intensity periodic variation with polarization direction, are observed upon excitation with 980 nm linearly polarized laser. Furthermore, nanorods with the controllable aspect ratio and symmetry are fabricated for analysis of the mechanism of polarization anisotropy. The comparative experiments suggest that intraions transition properties and crystal local symmetry dominate the polarization anisotropy, which is also confirmed by density functional theory calculations. Taking advantage of the REs based up-conversion, potential application in polarized microscopic multi-information transportation is suggested for the polarization anisotropy from REs doped fluoride single nanorod or nanorod array.
Please use this identifier to cite or link to this item: