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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Henry M. Van Driel
  • Vol. 24, Iss. 9 — Sep. 1, 2007
  • pp: 2349–2356

Transmitted behavior of the light waves through a horn-opened single nanoslit in finite-width metallic films

Si Di, Juan Liu, Ben-yuan Gu, Bin Hu, Xiao-dong Sun, Shang-qi Wang, and Yun Liu  »View Author Affiliations


JOSA B, Vol. 24, Issue 9, pp. 2349-2356 (2007)
http://dx.doi.org/10.1364/JOSAB.24.002349


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Abstract

Transmission properties of light waves through a horn-opened subwavelength-size single slit in finite-width homogeneous or inhomogeneous metallic films are studied by using the boundary integral method. We calculate transmission spectra in the visible wavelength regime, display the optical field intensity distributions, and demonstrate the directions of the energy flow. The results show that the transmission spectrum crucially depends on the physical and geometrical parameters of samples, for instance, the split angle in the horn-opened region of the slit, the width and depth of the slit, and the metallic materials surrounding the slit, etc. Two peaks in the transmission spectrum are observed for the nanoslit with a horn opening in the homogeneous metallic film, which originate from the metallic film and air slit, respectively. However, there are three peaks for the nanoslit in the hybrid metallic films consisting of two metallic films on either side of the slit, stitched together. Two peaks correspond to two different metallic materials, and the other one corresponds to the air slit, for the slit surrounded by two metallic materials. An equivalent structure is proposed to give an approximate description of the transmitted behavior.

© 2007 Optical Society of America

OCIS Codes
(220.4000) Optical design and fabrication : Microstructure fabrication
(240.0310) Optics at surfaces : Thin films
(240.6680) Optics at surfaces : Surface plasmons
(310.6860) Thin films : Thin films, optical properties

ToC Category:
Optics at Surfaces

History
Original Manuscript: October 12, 2006
Revised Manuscript: April 17, 2007
Manuscript Accepted: June 25, 2007
Published: August 23, 2007

Citation
Si Di, Juan Liu, Ben-yuan Gu, Bin Hu, Xiao-dong Sun, Shang-qi Wang, and Yun Liu, "Transmitted behavior of the light waves through a horn-opened single nanoslit in finite-width metallic films," J. Opt. Soc. Am. B 24, 2349-2356 (2007)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-24-9-2349

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