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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 17, Iss. 11 — May. 25, 2009
  • pp: 9212–9218

Bragg reflection of terahertz waves in plasmonic crystals

Eui Su Lee, D.H. Kang, A.I. Fernandez-Dominguez, F.J. Garcia-Vidal, L. Martin-Moreno, D.S. Kim, and Tae-In Jeon  »View Author Affiliations


Optics Express, Vol. 17, Issue 11, pp. 9212-9218 (2009)
http://dx.doi.org/10.1364/OE.17.009212


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Abstract

We present experimental and theoretical studies on terahertz surface plasmon (TSP) propagation on slit and rectangular aperture arrays in an aluminum sheet. Terahertz waves are coupled onto the plasmonic structures via a parallel plate waveguide. Long-lasting oscillations are observed in the temporal pulse shape after propagating through the periodic structure, whose Fourier transformation into the frequency domain results in Bragg-resonance spectral features. We show that the interference between the incident wave and the radiation reflected from both the aperture array and the waveguide block is responsible for this Bragg-resonance behavior. The reflection coefficient for a single slit is deduced to be 0.017 ± 0.002.

© 2009 OSA

OCIS Codes
(230.1480) Optical devices : Bragg reflectors
(240.6680) Optics at surfaces : Surface plasmons
(290.0290) Scattering : Scattering
(050.6624) Diffraction and gratings : Subwavelength structures

ToC Category:
Optics at Surfaces

History
Original Manuscript: March 6, 2009
Revised Manuscript: May 6, 2009
Manuscript Accepted: May 6, 2009
Published: May 15, 2009

Citation
Eui Su Lee, D. H. Kang, A. I. Fernandez-Dominguez, F. J. Garcia-Vidal, L. Martin-Moreno, D. S. Kim, and Tae-In Jeon, "Bragg reflection of terahertz waves in plasmonic crystals," Opt. Express 17, 9212-9218 (2009)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-17-11-9212


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