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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 14, Iss. 12 — Jun. 12, 2006
  • pp: 5013–5020

Electron multiplying CCD based detection for spatially resolved fluorescence correlation spectroscopy

Markus Burkhardt and Petra Schwille  »View Author Affiliations

Optics Express, Vol. 14, Issue 12, pp. 5013-5020 (2006)

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Fluorescence correlation spectroscopy (FCS) is carried out with an electron multiplying CCD (EMCCD). This new strategy is compared to standard detection by an avalanche photo diode showing good agreement with respect to the resulting autocorrelation curves. Applying different readout modes, a time resolution of 20 µs can be achieved, which is sufficient to resolve the diffusion of free dye in solution. The advantages of implementing EMCCD cameras in wide-field ultra low light imaging, as well as in multi-spot confocal laser scanning microscopy, can consequently also be exploited for spatially resolved FCS. First proof-of-principle FCS measurements with two excitation volumes demonstrate the advantage of the flexible CCD area detection.

© 2006 Optical Society of America

OCIS Codes
(040.1520) Detectors : CCD, charge-coupled device
(170.0170) Medical optics and biotechnology : Medical optics and biotechnology
(300.2530) Spectroscopy : Fluorescence, laser-induced

ToC Category:

Original Manuscript: April 24, 2006
Revised Manuscript: May 19, 2006
Manuscript Accepted: May 19, 2006
Published: June 12, 2006

Virtual Issues
Vol. 1, Iss. 7 Virtual Journal for Biomedical Optics

Markus Burkhardt and Petra Schwille, "Electron multiplying CCD based detection for spatially resolved fluorescence correlation spectroscopy," Opt. Express 14, 5013-5020 (2006)

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