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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry M. Van Driel
  • Vol. 24, Iss. 9 — Sep. 1, 2007
  • pp: 2307–2313

Interpretation of attenuated-total-reflection dips observed in surface plasmon resonance

Takashi Wakamatsu and Kazuhiro Saito  »View Author Affiliations


JOSA B, Vol. 24, Issue 9, pp. 2307-2313 (2007)
http://dx.doi.org/10.1364/JOSAB.24.002307


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Abstract

We present an interpretation that differs from an accepted explanation for resonance excitation of surface plasmons (SPs) on a metal using an attenuated total reflection (ATR) method. The metal ATR phenomenon is well expressed in terms of wave optics and accompanies an enhanced evanescent field. The ATR curves and the electric field and absorption distributions in the film layer for the noble metals are simulated numerically using electromagnetic wave analysis. The calculation results provide interpretation that the ATR dips are caused by an absorption loss of the metals produced by enhanced electric fields rather than the energy loss of a transfer excitation to the SPs: the damping loss converted into the SPs or the damping absorption of the once-converted propagation SPs. The sharp ATR dips do not necessarily demonstrate the high-resonance excitations of the SPs, and the metal ATR phenomenon is not restricted to the SPR.

© 2007 Optical Society of America

OCIS Codes
(120.4530) Instrumentation, measurement, and metrology : Optical constants
(240.6680) Optics at surfaces : Surface plasmons
(260.3910) Physical optics : Metal optics
(260.5740) Physical optics : Resonance
(310.6860) Thin films : Thin films, optical properties

ToC Category:
Physical Optics

History
Original Manuscript: January 22, 2007
Revised Manuscript: May 15, 2007
Manuscript Accepted: June 13, 2007
Published: August 21, 2007

Citation
Takashi Wakamatsu and Kazuhiro Saito, "Interpretation of attenuated-total-reflection dips observed in surface plasmon resonance," J. Opt. Soc. Am. B 24, 2307-2313 (2007)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-24-9-2307

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