Experimental demonstration of phase resonances in metallic compound gratings with subwavelength slits in the millimeter wave regime

MIGUEL NAVARRO-CÍA; DIANA CARINA SKIGIN; MIGUEL BERUETE; MARIO SOROLLA

APPLIED PHYSICS LETTERS

American Institute of Physics

Lugar: Melville; Año: 2009 vol. 94 p. 91107 - 91107

0003-6951

We provide experimental evidence of phase resonances in metallic periodic structures in which eachperiod comprises several subwavelength slits of the same width. We have analyzed and measuredthe response of these structures in the millimeter wave regime and show that phase resonances arecharacterized by a remarkable minimum in the transmission response, as predicted by numericalcalculations. We compare experimental with numerical results, obtaining a very good agreementbetween them. This experimental confirmation encourages research in compound structures andtheir multiple potential applications, such as frequency selective surfaces.