Torres Landívar, VíctorOrtuño Molinero, RubénRodríguez Ulibarri, PabloBeruete Díaz, MiguelSorolla Ayza, MarioGriol, AmadeuMartínez, AlejandroNavarro Cía, Miguel2014-06-262014-06-2620142045-2322 (electronic)131710.1038/srep03592https://academica-e.unavarra.es/handle/2454/11023UPNa. Departamento de Ingeniería Eléctrica y Electrónica. Laboratorio de fotónica TERALABWe present a mid-infrared inductor that when applied to an extraordinary transmission hole array produces a strong redshift of the resonant peak accompanied by an unprecedented enlargement of the operation bandwidth. The importance of the result is twofold: from a fundamental viewpoint, the direct applicability of equivalent circuit concepts borrowed from microwaves is demonstrated, in frequencies as high as 17â€...THz upholding unification of plasmonics and microwave concepts and allowing for a simplification of structure design and analysis; in practical terms, a broadband funnelling ofinfrared radiation with fractional bandwidth and efficiency as high as 97% and 48%, respectively, is achieved through an area less than one hundredth the squared wavelength, which leads to an impressive accessible strong field localization that may be of great interest in sensing applications.application/pdfeng© 2014 Macmillan Publishers Limited. All Rights Reserved. This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported license.PlasmonicsMid-infrared inductorsExtraordinary transmissioninfo:eu-repo/semantics/articleinfo:eu-repo/semantics/openAccess