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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 14, Iss. 8 — Apr. 17, 2006
  • pp: 3503–3511

Beaming light from a subwavelength metal slit surrounded by dielectric surface gratings

D. Z. Lin, C. K. Chang, Y. C. Chen, D. L. Yang, M. W. Lin, J. T. Yeh, J. M. Liu, C. H. Kuan, C. S. Yeh, and C. K Lee  »View Author Affiliations

Optics Express, Vol. 14, Issue 8, pp. 3503-3511 (2006)

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In this article, we demonstrate that a subwavelength metal slit surrounded by dielectric surface gratings possesses a directional beaming effect. We propose a surface plasmon diffraction scheme to explain the three kinds of beaming conditions. The numerical simulations of the illustrative structures undertaken used a Finite Difference Time Domain (FDTD) Method and a Rigorous Coupled Wave Analysis (RCWA) Method. Our simulations were found to be consistent and in agreement with the experimental results. In comparison with other metal structures, we find that dielectric metal structures offer better performance as well as the advantage of being able to be efficiently mass produced for large volume industrial applications.

© 2006 Optical Society of America

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(240.0240) Optics at surfaces : Optics at surfaces
(240.6680) Optics at surfaces : Surface plasmons

ToC Category:
Optics at Surfaces

Original Manuscript: January 31, 2006
Revised Manuscript: March 29, 2006
Manuscript Accepted: March 30, 2006
Published: April 17, 2006

D. Z. Lin, C.K. Chang, Y.C. Chen, D.L. Yang, M.W. Lin, J.T. Yeh, J.M. Liu, C.H. Kuan, C.S. Yeh, and C.K. Lee, "Beaming light from a subwavelength metal slit surrounded by dielectric surface gratings," Opt. Express 14, 3503-3511 (2006)

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