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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

  • Editor: Stephen A. Burns
  • Vol. 24, Iss. 6 — Jun. 1, 2007
  • pp: 1687–1694

Some properties of the optical resonances in a single subwavelength slit

O. Mata-Mendez and J. Avendaño  »View Author Affiliations


JOSA A, Vol. 24, Issue 6, pp. 1687-1694 (2007)
http://dx.doi.org/10.1364/JOSAA.24.001687


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Abstract

Diffraction of TM-polarized waves by a slit in a thick screen of infinite conductivity is treated. The case of an arbitrary incident beam wave is considered. We study the resonances that appear when the wavelength of the incident beam wave is larger than the slit width, i.e., the subwavelength regime where a one-mode model for the slit can be considered. High anomalous values (resonances) of the transmission coefficient, the angular diffracted energy, and the magnetic field within the slit are analyzed. A simple linear relationship to determine the resonant wavelengths is proposed. We show that the transmission coefficient, the normal diffracted energy, and the magnetic field within the cavity are linear functions of the resonant wavelength and the thickness of the screen. Additionally and surprisingly, we reveal that under certain conditions the incident beam wave via the diffraction can give a suppressed light transmission; i.e., a minimum in the transmission is obtained where a maximum is expected.

© 2007 Optical Society of America

OCIS Codes
(050.1220) Diffraction and gratings : Apertures
(050.1940) Diffraction and gratings : Diffraction
(050.1960) Diffraction and gratings : Diffraction theory

ToC Category:
Diffraction and Gratings

History
Original Manuscript: November 14, 2006
Manuscript Accepted: January 5, 2007
Published: May 9, 2007

Citation
O. Mata-Mendez and J. Avendaño, "Some properties of the optical resonances in a single subwavelength slit," J. Opt. Soc. Am. A 24, 1687-1694 (2007)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-24-6-1687

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