Navarro Cía, MiguelBeruete Díaz, MiguelSorolla Ayza, MarioCampillo, Igor2017-06-292017-06-292009https://academica-e.unavarra.es/handle/2454/24561Trabajo presentado al XXIV Simposium Nacional de la Unión Científica Internacional de Radio. Santander, 2009In this communication we report plano-concave and bi-concave metamaterial lenses based on the close stack of subwavelegnth hole arrays. Contrary to what is expected from cut-off holes, an engineered array of holes supports Extraordinary Transmission. Moreover, the medium formed when those structures are subwavelength stacked (thus, under metamaterial condition) behaves as a medium with effective negative index of refraction, which allows designing new lenses with properties that were only guessed at not long ago such as perfect imaging, subdiffraction and free-space matching to name a few.4 p.application/pdfspaLentes metálicasTransmisión extraordinariaÍndices de refracción negativosinfo:eu-repo/semantics/conferenceObjectAcceso abierto / Sarbide irekiainfo:eu-repo/semantics/openAccess