Spectroscopy of Bragg-scattered surface plasmons for characterization of thin biomolecular films
Optics Letters, Vol. 32, Issue 20, pp. 2903-2905 (2007)
http://dx.doi.org/10.1364/OL.32.002903
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Abstract
We report a new approach to characterization of thin (bio)molecular films based on spectroscopy of Bragg-scattered surface plasmons (BSSPs) generated by diffraction-coupling of counterpropagating surface plasmons on a metal-coated diffraction grating. The BSSPs exhibit fields with different penetration depths into the medium adjacent to the metal and therefore exhibit unequal sensitivities to the presence of (bio)molecular films on the surface of the metal. Therefore, spectroscopy of BSSPs enables in situ observation of the formation of biomolecular films and determination of both their refractive index and thickness. We demonstrate this capacity of spectroscopy of BSSPs in a model experiment in which growth of protein layers on a gold surface is studied.
© 2007 Optical Society of America
OCIS Codes
(240.0310) Optics at surfaces : Thin films
(240.6680) Optics at surfaces : Surface plasmons
(240.6690) Optics at surfaces : Surface waves
(240.6700) Optics at surfaces : Surfaces
ToC Category:
Optics at Surfaces
History
Original Manuscript: August 1, 2007
Revised Manuscript: September 4, 2007
Manuscript Accepted: September 6, 2007
Published: October 1, 2007
Virtual Issues
Vol. 2, Iss. 11 Virtual Journal for Biomedical Optics
Citation
Jakub Dostálek, Pavel Adam, Pavel Kvasnička, Olga Telezhnikova, and Jiří Homola, "Spectroscopy of Bragg-scattered surface plasmons for characterization of thin biomolecular films," Opt. Lett. 32, 2903-2905 (2007)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=ol-32-20-2903
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