Metal-Enhanced Up-Conversion Fluorescence: Effective Triplet−Triplet Annihilation near Silver Surface
- 16 November 2005
- journal article
- research article
- Published by American Chemical Society (ACS) in Nano Letters
- Vol. 5 (12) , 2482-2484
- https://doi.org/10.1021/nl0517969
Abstract
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).Keywords
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