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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 35, Iss. 7 — Apr. 1, 2010
  • pp: 992–994

Extraordinary infrared transmission through a periodic bowtie aperture array

Edward C. Kinzel and Xianfan Xu  »View Author Affiliations

Optics Letters, Vol. 35, Issue 7, pp. 992-994 (2010)

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The discovery of extraordinary transmission through periodic aperture arrays has generated significant interest. Most studies have used circular apertures and attributed enhanced transmission to surface plasmon polariton (SPP) resonances and/or Rayleigh–Wood anomalies (RWA). Bowtie apertures concentrate light and have much longer cutoff wavelengths than circular apertures and can be designed to be strongly resonant. We demonstrate here that the total transmission through a bowtie aperture array can exceed 85% ( 4 × the open area). Furthermore, we show that the high transmission is due to waveguide modes as opposed to the commonly believed SPP/RW phenomena. This work is focused on IR wavelengths near 9 μ m ; however, the results are broadly applicable and can be extended to optical frequencies.

© 2010 Optical Society of America

OCIS Codes
(050.1220) Diffraction and gratings : Apertures
(240.0240) Optics at surfaces : Optics at surfaces
(240.6680) Optics at surfaces : Surface plasmons

ToC Category:
Optics at Surfaces

Original Manuscript: December 14, 2009
Revised Manuscript: February 19, 2010
Manuscript Accepted: February 22, 2010
Published: March 26, 2010

Edward C. Kinzel and Xianfan Xu, "Extraordinary infrared transmission through a periodic bowtie aperture array," Opt. Lett. 35, 992-994 (2010)

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