Metal-enhanced up-conversion fluorescence: effective triplet-triplet annihilation near silver surface.
Up-conversion phenomena are traditionally related to two- or multiphoton processes occurring under relatively high excitation intensities. Here we present the first results of ultralow excitation intensity (in order of Wcm(-2)) continuous-wave (CW) excited up-conversion fluorescence in Kretschmann surface plasmon geometry. The active system is a blue-emitting polymer matrix blended with metalated porphyrine macrocycles. The up-conversion fluorescence is a consequence of a two-particle triplet-triplet annihilation process (TTA).
Baluschev
Stanislav
S
Max-Planck-Institute for Polymer Research, Ackermannweg 10, 55128 Mainz, Germany. balouche@mpip-mainz.mpg.de
Yu
Fang
F
Miteva
Tzenka
T
Ahl
Stefanie
S
Yasuda
Akio
A
Nelles
Gabriele
G
Knoll
Wolfgang
W
Wegner
Gerhard
G
D004307:Dose-Response Relationship, Radiation; D007834:Lasers; D049449:Luminescence; D008422:Materials Testing; D049329:Nanostructures / Q000737:chemistry* / Q000528:radiation effects*; D012834:Silver / Q000737:chemistry*; D013050:Spectrometry, Fluorescence / Q000379:methods*; D020349:Surface Plasmon Resonance / Q000379:methods*; D013499:Surface Properties
D012834:Silver