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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 17 — Aug. 16, 2010
  • pp: 17876–17882

Optical transmission anomalies in a double-layered metallic slit array

Koichi Akiyama, Keisuke Takano, Yuji Abe, Yasunori Tokuda, and Masanori Hangyo  »View Author Affiliations


Optics Express, Vol. 18, Issue 17, pp. 17876-17882 (2010)
http://dx.doi.org/10.1364/OE.18.017876


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Abstract

We theoretically predicted the existence of an anomalous optical transmittance dip, which must be observed for a metamaterial structure with two metallic slabs with cut-through slit arrays of a constant period d under a normal incident condition. By changing the relative lateral displacement l between the two slabs, the dip frequency varies across that of a so-called Rayleigh-Wood’s (RW) anomaly frequency. The mechanism of this anomaly is quite different from that of the RW anomaly and interpreted in terms of the interference between the propagating and evanescent waves. For the present double-layered system, furthermore, it is suggested that the RW anomaly vanishes for l = 0 and d/2. In experiments in the terahertz region, we observe that the fundamental features agree with these theoretical predictions.

© 2010 OSA

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(240.6690) Optics at surfaces : Surface waves
(250.5403) Optoelectronics : Plasmonics
(300.6495) Spectroscopy : Spectroscopy, teraherz

ToC Category:
Diffraction and Gratings

History
Original Manuscript: June 7, 2010
Revised Manuscript: July 12, 2010
Manuscript Accepted: July 18, 2010
Published: August 4, 2010

Citation
Koichi Akiyama, Keisuke Takano, Yuji Abe, Yasunori Tokuda, and Masanori Hangyo, "Optical transmission anomalies in a double-layered metallic slit array," Opt. Express 18, 17876-17882 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-17-17876


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