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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 14, Iss. 20 — Oct. 2, 2006
  • pp: 9350–9357

Fast determination of saturation intensity and maximum emission rate by single-emitter imaging

J. Y. P. Butter and B. Hecht  »View Author Affiliations


Optics Express, Vol. 14, Issue 20, pp. 9350-9357 (2006)
http://dx.doi.org/10.1364/OE.14.009350


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Abstract

We investigate the dependence of the spot size in single-emitter confocal imaging on the degree of saturation. We show that single-emitter spots are broadened and flattened significantly already at excitation intensities well below saturation. The resulting single-emitter spot shapes thus deviate significantly from the excitation point spread function. We show and support by Monte Carlo simulations that fitting of a single spot is sufficient to extract the saturation intensity and the maximum emission rate of a single emitter with high accuracy. Our results will be of interest in all areas of single-emitter studies.

© 2006 Optical Society of America

OCIS Codes
(180.1790) Microscopy : Confocal microscopy
(260.2510) Physical optics : Fluorescence
(270.0270) Quantum optics : Quantum optics
(300.6280) Spectroscopy : Spectroscopy, fluorescence and luminescence

ToC Category:
Microscopy

History
Original Manuscript: July 25, 2006
Revised Manuscript: September 11, 2006
Manuscript Accepted: September 11, 2006
Published: October 2, 2006

Virtual Issues
Vol. 1, Iss. 11 Virtual Journal for Biomedical Optics

Citation
J. Y. P. Butter and B. Hecht, "Fast determination of saturation intensity and maximum emission rate by single-emitter imaging," Opt. Express 14, 9350-9357 (2006)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-14-20-9350


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