Dipolar resonances in conductive carbon micro-fibers probed by near-field terahertz spectroscopy
- Univ. College London, London (United Kingdom); ITMO Univ., St. Petersburg (Russia); Public Univ. of Navarra, Navarra (Spain)
- Univ. College London, London (United Kingdom); Imperial College London, London (United Kingdom)
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- St. Petersburg State Polytechnic Univ., St. Petersburg (Russia)
- Univ. College London, London (United Kingdom); Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
In this study, 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∙104 S/m. This approach is suitable for experimental characterization of individual doped semiconductor resonators for THz metamaterials and devices.
- Research Organization:
- Sandia National Laboratories (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
- Grant/Contract Number:
- AC04-94AL85000
- OSTI ID:
- 1235925
- Report Number(s):
- SAND--2015-9125J; 608005
- Journal Information:
- Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 2 Vol. 107; ISSN APPLAB; ISSN 0003-6951
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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