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Optical Materials Express

Optical Materials Express

  • Editor: David J. Hagan
  • Vol. 1, Iss. 7 — Nov. 1, 2011
  • pp: 1301–1306

Spectral tuning of IR-resonant nanoantennas by nanogap engineering

Daniel Weber, Julia Katzmann, Frank Neubrech, Thomas Härtling, and Annemarie Pucci  »View Author Affiliations

Optical Materials Express, Vol. 1, Issue 7, pp. 1301-1306 (2011)

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We report on tuning the plasmonic properties of gold nanoantenna arrays resonant in the infrared (IR) spectral region. In particular, we achieve a manipulation of the antenna resonance by decreasing the antenna separation distance via photochemical metal deposition. Narrowing the antenna gaps is monitored using scanning electron microscopy, while increased plasmonic coupling and an associated red-shift of the plasmon resonance is observed by microscopic IR spectroscopy. Since smaller gap sizes lead to enhanced electric fields between the antenna arms, we propose photochemical metal deposition as a fabrication step for surface-enhanced IR spectroscopy (SEIRS) substrates.

© 2011 OSA

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(300.6340) Spectroscopy : Spectroscopy, infrared
(350.5130) Other areas of optics : Photochemistry
(220.4241) Optical design and fabrication : Nanostructure fabrication
(250.5403) Optoelectronics : Plasmonics

ToC Category:

Original Manuscript: August 4, 2011
Revised Manuscript: September 20, 2011
Manuscript Accepted: October 13, 2011
Published: October 17, 2011

Daniel Weber, Julia Katzmann, Frank Neubrech, Thomas Härtling, and Annemarie Pucci, "Spectral tuning of IR-resonant nanoantennas by nanogap engineering," Opt. Mater. Express 1, 1301-1306 (2011)

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