Dipolar resonances in conductive carbon micro-fibers probed by near-field terahertz spectroscopy
Fecha
2015Versión
Acceso abierto / Sarbide irekia
Tipo
Artículo / Artikulua
Versión
Versión publicada / Argitaratu den bertsioa
Impacto
|
10.1063/1.4926628
Resumen
We observe dipole resonances in thin conductive carbon micro-fibers by detecting an enhanced
electric field in the near-field of a single fiber at terahertz (THz) frequencies. Time-domain analysis
of the electric field shows that each fiber sustains resonant current oscillations at the frequency
defined by the fiber’s length. Strong dependence of the observed resonance frequency and degree
of ...
[++]
We observe dipole resonances in thin conductive carbon micro-fibers by detecting an enhanced
electric field in the near-field of a single fiber at terahertz (THz) frequencies. Time-domain analysis
of the electric field shows that each fiber sustains resonant current oscillations at the frequency
defined by the fiber’s length. Strong dependence of the observed resonance frequency and degree
of field enhancement on the fibers’ conductive properties enable direct non-contact probing of the
THz conductivity in single carbon micro-fibers. We find the conductivity of the fibers to be within
the range of 1–5 10 4 S/m. This approach is suitable for experimental characterization of individual
doped semiconductor resonators for THz metamaterials and devices. [--]
Materias
Dipolar resonances,
Carbon micro-fibers,
Near-field terahertz spectroscopy
Editor
AIP Publishing
Publicado en
Applied Physics Letters, 107, 021102 (2015)
Departamento
Universidad Pública de Navarra. Departamento de Ingeniería Eléctrica y Electrónica /
Nafarroako Unibertsitate Publikoa. Ingeniaritza Elektrikoa eta Elektronikoa Saila
Versión del editor
Entidades Financiadoras
This work was supported by the Royal Society [Grant No.
UF130493], RFBR [Project No. 14-22-02064 ofi-m] and
Imperial College London [Junior Research Fellowship] and
partially supported by the Government of the Russian
Federation [Grant No. 074-U01].