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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: G. I. Stegeman
  • Vol. 23, Iss. 8 — Aug. 1, 2006
  • pp: 1517–1523

Effect of groove periodicity on the enhanced transmission through a single subwavelength slit

Zu-Bin Li, Jian-Guo Tian, Wen-Yuan Zhou, Zhi-Bo Liu, and Wei-Ping Zang  »View Author Affiliations


JOSA B, Vol. 23, Issue 8, pp. 1517-1523 (2006)
http://dx.doi.org/10.1364/JOSAB.23.001517


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Abstract

Transmission through a single subwavelength slit surrounded by nonperiodic or approximately periodic grooves in perfect conductive film has been analyzed numerically by the finite-difference time-domain method. Results show that the periodicity of the grooves is not the necessary condition to enhance the transmission, but is sufficient to obtain high enhancement. A spectrum with low enhancement and multiple peaks is obtained through a slit with nonperiodic grooves that is due to the resonances at different wavelengths caused by nonperiodicity. The spectrum of a slit with approximately periodic grooves is almost similar to that of a slit with absolutely periodic grooves regardless of whether the grooves are symmetric with respect to the slit, especially when the deflection of the grooves is very small compared to the grooves’ period.

© 2006 Optical Society of America

OCIS Codes
(050.1220) Diffraction and gratings : Apertures
(050.2770) Diffraction and gratings : Gratings
(230.4000) Optical devices : Microstructure fabrication
(240.6690) Optics at surfaces : Surface waves

ToC Category:
Diffraction and Gratings

History
Original Manuscript: November 30, 2005
Revised Manuscript: March 18, 2006
Manuscript Accepted: March 24, 2006

Citation
Zu-Bin Li, Jian-Guo Tian, Wen-Yuan Zhou, Zhi-Bo Liu, and Wei-Ping Zang, "Effect of groove periodicity on the enhanced transmission through a single subwavelength slit," J. Opt. Soc. Am. B 23, 1517-1523 (2006)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-23-8-1517


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