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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 9 — Apr. 28, 2008
  • pp: 6267–6273

Extraordinary optical transmission through metallic films perforated with aperture arrays having short-range order

Amit Agrawal, Tatsunosuke Matsui, Z. Valy Vardeny, and Ajay Nahata  »View Author Affiliations

Optics Express, Vol. 16, Issue 9, pp. 6267-6273 (2008)

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Using terahertz time-domain spectroscopy, we have measured the optical properties of metallic films perforated with arrays of subwavelength apertures that possess short-range order (SRO), but lack long-range orientational order (LRO). We demonstrate that extraordinary transmission enhancement still occurs through the SRO aperture structures, despite the absence of LRO. The dielectric response of these arrays is characterized by a superposition of a broad principal resonance that is due to the random rotations of the building block (BB) units, and discrete resonances arising from well-defined reciprocal vectors in the structure factor that result from a virtual lattice associated with the BB units.

© 2008 Optical Society of America

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(240.6690) Optics at surfaces : Surface waves
(260.3090) Physical optics : Infrared, far
(160.1245) Materials : Artificially engineered materials
(050.6624) Diffraction and gratings : Subwavelength structures

ToC Category:
Diffraction and Gratings

Original Manuscript: February 22, 2008
Revised Manuscript: April 11, 2008
Manuscript Accepted: April 16, 2008
Published: April 21, 2008

Amit Agrawal, Tatsunosuke Matsui, Z. V. Vardeny, and Ajay Nahata, "Extraordinary optical transmission through metallic films perforated with aperture arrays having short-range order," Opt. Express 16, 6267-6273 (2008)

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