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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 18, Iss. 23 — Nov. 8, 2010
  • pp: 23957–23964

Millimeter-wave phase resonances in compound reflection gratings with subwavelength grooves

Miguel Beruete, Miguel Navarro-Cía, Diana C. Skigin, and Mario Sorolla  »View Author Affiliations


Optics Express, Vol. 18, Issue 23, pp. 23957-23964 (2010)
http://dx.doi.org/10.1364/OE.18.023957


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Abstract

Experimental evidence of phase resonances in a dual-period reflection structure comprising three subwavelength grooves in each period is provided in the millimeter-wave regime. We have analyzed and measured the response of these structures and show that phase resonances are characterized by a minimum in the reflected response, as predicted by numerical calculations. It is also shown that under oblique incidence these structures exhibit additional phase resonances not present for normal illumination because of the potentially permitted odd field distribution. A satisfactory agreement between the experimental and numerical reflectance curves is obtained. These results confirm the recent theoretical predictions of phase resonances in reflection gratings in the millimeter-wave regime, and encourage research in this subject due to the multiple potential applications, such as frequency selective surfaces, backscattering reduction and complex-surface-wave-based sensing. In addition, it is underlined here that the response becomes much more complex than the mere infinite analysis when one considers finite periodic structures as in the real experiment.

© 2010 Optical Society of America

OCIS Codes
(290.5820) Scattering : Scattering measurements
(350.4010) Other areas of optics : Microwaves
(240.5440) Optics at surfaces : Polarization-selective devices

ToC Category:
Diffraction and Gratings

History
Original Manuscript: August 25, 2010
Revised Manuscript: September 17, 2010
Manuscript Accepted: September 17, 2010
Published: October 29, 2010

Citation
Miguel Beruete, Miguel Navarro-Cía, Diana C. Skigin, and Mario Sorolla, "Millimeter-wave phase resonances in compound reflection gratings with subwavelength grooves," Opt. Express 18, 23957-23964 (2010)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-18-23-23957


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