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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 48, Iss. 30 — Oct. 20, 2009
  • pp: 5863–5870

Anomalous reflection in a metallic plate with subwavelength grooves of circular cross section

Claudio I. Valencia and Diana C. Skigin  »View Author Affiliations


Applied Optics, Vol. 48, Issue 30, pp. 5863-5870 (2009)
http://dx.doi.org/10.1364/AO.48.005863


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Abstract

Resonant features in the response of finite arrays of rectangular grooves ruled on a metallic plate have been reported in connection with the excitation of phase resonances. These anomalies are generated by a particular arrangement of the magnetic field phases inside the subwavelength grooves when the structure is illuminated by a p-polarized electromagnetic wave. We show that this kind of resonance is also present for grooves of circular cross section and appear as sharp peaks in the specular response, the number of which increases with the number of grooves in the structure. A significant intensification of the field within the grooves is also found for these particular phase configurations. The dependence of the response on the geometrical parameters of the structure is analyzed in detail, in order to consider these structures for potential applications such as frequency selectors and polarizers.

© 2009 Optical Society of America

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(240.3695) Optics at surfaces : Linear and nonlinear light scattering from surfaces

ToC Category:
Optics at Surfaces

History
Original Manuscript: July 15, 2009
Manuscript Accepted: September 2, 2009
Published: October 19, 2009

Citation
Claudio I. Valencia and Diana C. Skigin, "Anomalous reflection in a metallic plate with subwavelength grooves of circular cross section," Appl. Opt. 48, 5863-5870 (2009)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-48-30-5863

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