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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 15 — Jul. 20, 2009
  • pp: 13222–13235

A detection instrument for enhanced-fluorescence and label-free imaging on photonic crystal surfaces

Ian D. Block, Patrick C. Mathias, Nikhil Ganesh, Sarah I. Jones, Brian R. Dorvel, Vikram Chaudhery, Lila O. Vodkin, Rashid Bashir, and Brian T. Cunningham  »View Author Affiliations

Optics Express, Vol. 17, Issue 15, pp. 13222-13235 (2009)

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We report on the design and demonstration of an optical imaging system capable of exciting surface-bound fluorophores within the resonant evanescent electric field of a photonic crystal surface and gathering fluorescence emission that is directed toward the imaging objective by the photonic crystal. The system also has the ability to quantify shifts in the local resonance angle induced by the adsorption of biomolecules on the photonic crystal surface for label-free biomolecular imaging. With these two capabilities combined within a single detection system, we demonstrate label-free images self-registered to enhanced fluorescence images with 328x more sensitive fluorescence detection relative to a glass surface. This technique is applied to a DNA microarray where label-free quantification of immobilized capture DNA enables improved quality control and subsequent enhanced fluorescence detection of dye-tagged hybridized DNA yields 3x more genes to be detected versus commercially available microarray substrates.

© 2009 Optical Society of America

OCIS Codes
(180.2520) Microscopy : Fluorescence microscopy
(280.1415) Remote sensing and sensors : Biological sensing and sensors
(050.5298) Diffraction and gratings : Photonic crystals

ToC Category:

Original Manuscript: June 5, 2009
Revised Manuscript: July 9, 2009
Manuscript Accepted: July 11, 2009
Published: July 17, 2009

Virtual Issues
Vol. 4, Iss. 9 Virtual Journal for Biomedical Optics

Ian D. Block, Patrick C. Mathias, Nikhil Ganesh, Sarah I. Jones, Brian R. Dorvel, Vikram Chaudhery, Lila O. Vodkin, Rashid Bashir, and Brian T. Cunningham, "A detection instrument for enhanced-fluorescence and label-free imaging on photonic crystal surfaces," Opt. Express 17, 13222-13235 (2009)

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