Photothermal measurement of absorption and scattering losses in thin films excited by surface plasmons
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/ol/abstract.cfm?URI=ol-34-24-3797
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