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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Vol. 18, Iss. 7 — Jul. 1, 2001
  • pp: 1477–1486

Diffraction by a subwavelength-sized aperture in a metal plane

D. J. Shin, A. Chavez-Pirson, S. H. Kim, S. T. Jung, and Y. H. Lee  »View Author Affiliations


JOSA A, Vol. 18, Issue 7, pp. 1477-1486 (2001)
http://dx.doi.org/10.1364/JOSAA.18.001477


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Abstract

We present an experimental study on the diffraction of light by an aperture small compared with the wavelength. The aperture is illuminated by laser light guided in a metal-clad tapered optical fiber. We investigate different orientations of the aperture in the plane: normal to the cleaved plane, oblique to the cleaved plane, and off-center. We measure the far-field, two-dimensional intensity distributions of the diffracted light as functions of angle coordinates θ and ϕ in a full half-space for various polarization states and analyze the patterns by using low-order multipole fields. We also examine the near- and far-field effects of placing small periodic corrugations near the aperture, focusing on the role of surface-wave excitations. We measure the near-field intensity distributions near the aperture with a near-field scanning optical microscope and discuss their relation to the far-field diffracted fields.

© 2001 Optical Society of America

OCIS Codes
(050.1220) Diffraction and gratings : Apertures
(050.1940) Diffraction and gratings : Diffraction
(240.6690) Optics at surfaces : Surface waves

History
Original Manuscript: August 15, 2000
Revised Manuscript: December 21, 2000
Manuscript Accepted: December 21, 2000
Published: July 1, 2001

Citation
D. J. Shin, A. Chavez-Pirson, S. H. Kim, S. T. Jung, and Y. H. Lee, "Diffraction by a subwavelength-sized aperture in a metal plane," J. Opt. Soc. Am. A 18, 1477-1486 (2001)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-18-7-1477


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References

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