Extraordinary THz transmission with a small beam spot: the leaky wave mechanism
Date
2018Version
Acceso abierto / Sarbide irekia
Type
Artículo / Artikulua
Version
Versión aceptada / Onetsi den bertsioa
Impact
|
10.1002/adom.201701312
Abstract
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. [--]
Subject
Continuous-wave spectroscopy,
Extraordinary transmission,
Leaky wave mode,
Terahertz,
Time-domain spectroscopy
Publisher
Wiley
Published in
Advanced Optical Materials 2018, 1701312
Description
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.
Departament
Universidad Pública de Navarra/Nafarroako Unibertsitate Publikoa. Institute of Smart Cities - ISC
Publisher version
Sponsorship
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.