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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

| EXPLORING THE INTERFACE OF LIGHT AND BIOMEDICINE

  • Editor: Gregory W. Faris
  • Vol. 5, Iss. 1 — Jan. 4, 2010

Photothermal measurement of absorption and scattering losses in thin films excited by surface plasmons

Esteban A. Domené, Francisco Balzarotti, Andrea V. Bragas, and Oscar E. Martínez  »View Author Affiliations


Optics Letters, Vol. 34, Issue 24, pp. 3797-3799 (2009)
http://dx.doi.org/10.1364/OL.34.003797


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Abstract

We present a novel noncontact, photothermal technique, based on the focus error signal of a commercial CD pickup head that allows direct determination of absorption in thin films. Combined with extinction methods, this technique yields the scattering contribution to the losses. Surface plasmon polaritons are excited using the Kretschmann configuration in thin Au films of varying thickness. By measuring the extinction and absorption simultaneously, it is shown that dielectric constants and thickness retrieval leads to inconsistencies if the model does not account for scattering.

© 2009 Optical Society of America

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(290.5880) Scattering : Scattering, rough surfaces

ToC Category:
Scattering

History
Original Manuscript: August 7, 2009
Revised Manuscript: October 8, 2009
Manuscript Accepted: October 16, 2009
Published: December 4, 2009

Virtual Issues
Vol. 5, Iss. 1 Virtual Journal for Biomedical Optics

Citation
Esteban A. Domené, Francisco Balzarotti, Andrea V. Bragas, and Oscar E. Martínez, "Photothermal measurement of absorption and scattering losses in thin films excited by surface plasmons," Opt. Lett. 34, 3797-3799 (2009)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=ol-34-24-3797

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