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Proceedings Paper

Control of single-molecule fluorescence dynamics by stimulated emission depletion
Author(s): Richard J. Marsh; Mark A. Osborne; Angus J. Bain
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Paper Abstract

The feasibility of manipulating the single molecule absorption-emission cycle using picosecond stimulated emission depletion (STED) is investigated using a stochastic computer simulation. In the simulation the molecule is subjected to repeated excitation and depletion events using time delayed pairs of excitation (PUMP) and depletion (DUMP) pulses derived from a high repetition rate pulsed laser system. The model is used to demonstrate that a significant and even substantial reduction in the occurrence of 'dark states' in the fluorescence emission can be achieved using stimulated emission depletion. Variation in the PUMP-DUMP window allows precise control of the fluorescence yield with substantial increases in the fluorescence intensity observed at early PUMP-DUMP delays.

Paper Details

Date Published: 14 November 2003
PDF: 9 pages
Proc. SPIE 5222, Nanocrystals, and Organic and Hybrid Nanomaterials, (14 November 2003); doi: 10.1117/12.505861
Show Author Affiliations
Richard J. Marsh, Univ. College London (United Kingdom)
Mark A. Osborne, Univ. of Sussex (United Kingdom)
Angus J. Bain, Univ. College London (United Kingdom)


Published in SPIE Proceedings Vol. 5222:
Nanocrystals, and Organic and Hybrid Nanomaterials
Alexander N. Cartwright; David L. Andrews; Zeno Gaburro; Charles Y. C. Lee, Editor(s)

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