Millimeter-wave phase resonances in compound reflection gratings with subwavelength grooves
Fecha
2010Versión
Acceso abierto / Sarbide irekia
Tipo
Artículo / Artikulua
Versión
Versión publicada / Argitaratu den bertsioa
Impacto
|
10.1364/OE.18.023957
Resumen
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 und ...
[++]
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. [--]
Materias
Millimeter-wave phase resonances,
Subwavelength grooves
Editor
Optical Society of America
Publicado en
Optics Express, Vol. 18, Issue 23, pp. 23957-23964 (2010)
Departamento
Universidad Pública de Navarra. Departamento de Ingeniería Eléctrica y Electrónica /
Nafarroako Unibertsitate Publikoa. Ingeniaritza Elektrikoa eta Elektronikoa Saila
Versión del editor
Entidades Financiadoras
D.S. gratefully acknowledges partial support from Consejo Nacional de Investigaciones
Científicas y Técnicas (CONICET PIP 112-200801-01880), Universidad de Buenos Aires (UBA X208) and Agencia Nacional de Promocion Científica y Tecnológica (ANPCYT-BID1728 /OC-AR06-01785). This work was also supported by Consolider “ENGINEERING
METAMATERIALS” CSD2008-00066.