(Optical Society of America, 2007) Beruete Díaz, Miguel; Navarro Cía, Miguel; Sorolla Ayza, Mario; Campillo, Igor; Ingeniería Eléctrica y Electrónica; Ingeniaritza Elektrikoa eta Elektronikoa
In this paper we design and measure a metamaterial polarizing
device working in the sub-terahertz range. The polarizer is based on a
modified version of our previous miniaturized Stacked Hole Array (SHA)
structure, an arrangement that combines Extraordinary Optical Transmission
(EOT) and Left-Handed Metamaterial (LHM) propagation even under
Fresnel illumination. Here, we use a self complementary screen by
connecting the holes of an EOT structure. Importantly, EOT remains and
simultaneously total reflection is obtained for the orthogonal component.
Moreover, by computing the dispersion diagram, we demonstrate that LHM
propagation can be achieved for the principal polarization within the stop
band of the orthogonal component, which propagates in other bands as a
standard forward wave. Finally, we check our conjectures by measuring the
transmission and reflection coefficients of screens milled on a low-loss
microwave substrate. Measurements have been taken for 1 to 6 stacked
wafers and they show clearly that the stack acts as a polarizer with lefthanded
characteristic. Our results open the way to design of novel
polarization control metamaterials at Terahertz wavelengths.
