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Proceedings Paper

Stimulated emission depletion and fluorescence correlation spectroscopy of a branched quadrupolar chromophore
Author(s): D. A. Armoogum; R. J. Marsh; N. Nicolaou; O. Mongin; M. Blanchard-Desce; A. J. Bain
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Paper Abstract

Stimulated emission depletion (STED) and single molecule fluorescence correlation spectroscopy (FCS) are used to determine stimulated emission cross-sections and investigate non-radiative relaxation in a branched quadrupolar chromophore (OM77). The results are used as inputs to simulations of single molecule STED by which the feasibility of STED control of the single molecule fluorescence cycle can be assessed. Single molecule STED in OM77 is shown to be readily achievable; however its effectiveness in reducing triplet trapping is apparently mediated by fast non-radiative relaxation processes other than intersystem crossing and rapid quenching of the triplet state in a non-deoxygenated environment.

Paper Details

Date Published: 4 September 2008
PDF: 10 pages
Proc. SPIE 7030, Nanophotonic Materials V, 70300S (4 September 2008); doi: 10.1117/12.794558
Show Author Affiliations
D. A. Armoogum, Univ. College London (United Kingdom)
R. J. Marsh, Univ. College London (United Kingdom)
N. Nicolaou, Univ. College London (United Kingdom)
O. Mongin, Synthèse of ElectroSynthèse Organiques, CNRS, Univ. de Rennes I (France)
M. Blanchard-Desce, Synthèse of ElectroSynthèse Organiques, CNRS, Univ. de Rennes I (France)
A. J. Bain, Univ. College London (United Kingdom)

Published in SPIE Proceedings Vol. 7030:
Nanophotonic Materials V
Zeno Gaburro; Stefano Cabrini; Dmitri Talapin, Editor(s)

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