Dipolar resonances in conductive carbon micro-fibers probed by near-field terahertz spectroscopy

I. Khromova; M. Navarro-Cía; I. Brener; J. L. Reno; A. Ponomarev; O. Mitrofanov

doi:10.1063/1.4926628

Dipolar resonances in conductive carbon micro-fibers probed by near-field terahertz spectroscopy

I. Khromova, M. Navarro-Cía, I. Brener, J. L. Reno, A. Ponomarev, O. Mitrofanov

Engineering and Physical Sciences

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Abstract

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 x 10^4 S/m. This approach is suitable for experimental characterization of individual doped semiconductor resonators for THz metamaterials and devices

Original language	English
Article number	021102
Journal	Applied Physics Letters
Volume	107
Issue number	2
DOIs	https://doi.org/10.1063/1.4926628
Publication status	Published - 13 Jul 2015

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Khromova_et_al_Dipolar_resonances_Applied_Physics_Letters_2015
Copyright (2015) AIP Publishing. This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. he following article appeared in Khromova, I., et al. "Dipolar resonances in conductive carbon micro-fibers probed by near-field terahertz spectroscopy." Applied Physics Letters 107.2 (2015): 021102. and may be found at http://dx.doi.org/10.1063/1.4926628 Checked Jan 2016
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title = "Dipolar resonances in conductive carbon micro-fibers probed by near-field terahertz spectroscopy",

abstract = "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{\textquoteright}s length. Strong dependence of the observed resonance frequency and degree of field enhancement on the fibers{\textquoteright} 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 x 10^4 S/m. This approach is suitable for experimental characterization of individual doped semiconductor resonators for THz metamaterials and devices",

author = "I. Khromova and M. Navarro-C{\'i}a and I. Brener and Reno, {J. L.} and A. Ponomarev and O. Mitrofanov",

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T1 - Dipolar resonances in conductive carbon micro-fibers probed by near-field terahertz spectroscopy

AU - Khromova, I.

AU - Navarro-Cía, M.

AU - Brener, I.

AU - Reno, J. L.

AU - Ponomarev, A.

AU - Mitrofanov, O.

PY - 2015/7/13

Y1 - 2015/7/13

N2 - 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 x 10^4 S/m. This approach is suitable for experimental characterization of individual doped semiconductor resonators for THz metamaterials and devices

AB - 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 x 10^4 S/m. This approach is suitable for experimental characterization of individual doped semiconductor resonators for THz metamaterials and devices

UR - http://www.mendeley.com/research/dipolar-resonances-conductive-carbon-microfibers-probed-nearfield-terahertz-spectroscopy

U2 - 10.1063/1.4926628

DO - 10.1063/1.4926628

M3 - Article

SN - 0003-6951

VL - 107

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 2

M1 - 021102

ER -

Dipolar resonances in conductive carbon micro-fibers probed by near-field terahertz spectroscopy

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