Extraordinary THz transmission with a small beam spot: the leaky wave mechanism
Fecha
2018Versión
Acceso abierto / Sarbide irekia
Tipo
Artículo / Artikulua
Versión
Versión aceptada / Onetsi den bertsioa
Impacto
|
10.1002/adom.201701312
Resumen
The discovery of extraordinary optical transmission (EOT) through patterned
metallic foils in the late 1990s was decisive for the development of plasmonics
and cleared the path to employ small apertures for a variety of interesting
applications all along the electromagnetic spectrum. However, a typical
drawback often found in practical EOT structures is the large size needed to
obtain high t ...
[++]
The discovery of extraordinary optical transmission (EOT) through patterned
metallic foils in the late 1990s was decisive for the development of plasmonics
and cleared the path to employ small apertures for a variety of interesting
applications all along the electromagnetic spectrum. However, a typical
drawback often found in practical EOT structures is the large size needed to
obtain high transmittance peaks. Consequently, practical EOT arrays are usually
illuminated using an expanded (mimicking a plane wave) beam. Here, it
is shown with numerical and experimental results in the THz range that high
transmittance peaks can be obtained even with a reduced illumination spot
exciting a small number of holes, provided that the structure has a sufficient
number of lateral holes out of the illumination spot. These results shed more
light on the prominent role of leaky waves in the underlying physics of EOT
and have a direct impact on potential applications. [--]
Materias
Continuous-wave spectroscopy,
Extraordinary transmission,
Leaky wave mode,
Terahertz,
Time-domain spectroscopy
Editor
Wiley
Publicado en
Advanced Optical Materials 2018, 1701312
Notas
This is the peer reviewed version of the following article: M. Navarro-Cía, V. Pacheco-Peña, S. A. Kuznetsov, M. Beruete: Extraordinary THz Transmission with a Small Beam Spot: The Leaky Wave Mechanism. Advanced Optical Materials 2018, 1701312, which has been published in final form at https://doi.org/10.1002/adom.201701312. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
Departamento
Universidad Pública de Navarra/Nafarroako Unibertsitate Publikoa. Institute of Smart Cities - ISC
Versión del editor
Entidades Financiadoras
This work was partially supported by the Spanish Ministerio de
Economía y Competitividad with European Union Fondo Europeo de
Desarrollo Regional (FEDER) funds [TEC2014-51902-C2-2-R]. M.N.-C.
acknowledges support from University of Birmingham [Birmingham
Fellowship]. V.P.-P. was sponsored by Spanish Ministerio de Educación,
Cultura y Deporte [formación de profesorado universitario (FPU)
AP-2012-3796]. S.A.K. acknowledges support from the Novosibirsk State
University (NSU) program 5-100 established by the Russian Ministry of
Education and Science.