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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Editor: Henry M. Van Driel
  • Vol. 25, Iss. 3 — Mar. 1, 2008
  • pp: 443–447

Characteristic analysis of evanescent wave moiré fringes

Fabo Deng, Chunlei Du, and Xiangang Luo  »View Author Affiliations

JOSA B, Vol. 25, Issue 3, pp. 443-447 (2008)

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Based on the characteristics of evanescent wave moiré fringes generated from subwavelength gratings, we numerically investigated the contrast of moiré fringes for two gratings with and without a silver slab. The effect of the gratings’ geometrical parameters on the contrast of moiré fringes is analyzed in detail by using the finite-difference time domain method. Numerical results show that great enhancement of the contrast of evanescent wave moiré fringes could be achieved by surface plasmon excitations on a silver slab. These evanescent wave moiré fringes with high contrast will have potential applications in the nanofabrication field.

© 2008 Optical Society of America

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(050.6624) Diffraction and gratings : Subwavelength structures

ToC Category:
Diffraction and Gratings

Original Manuscript: September 27, 2007
Manuscript Accepted: November 5, 2007
Published: February 29, 2008

Fabo Deng, Chunlei Du, and Xiangang Luo, "Characteristic analysis of evanescent wave moiré fringes," J. Opt. Soc. Am. B 25, 443-447 (2008)

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