Direct Measurements of Terahertz Meta-atoms with Near-Field Emission of Terahertz Waves

Direct Measurements of Terahertz Meta-atoms with Near-Field Emission of Terahertz Waves We present the direct measurements of terahertz meta-atoms, an elementary unit of metamaterials, by using locally generated terahertz waves in the near-field region. In contrast to a conventional far-field terahertz spectroscopy or imaging, our technique features the localized emission of coherent terahertz pulses on a sub-wavelength scale, which has a potential for visualizing details of dynamics of each meta-atom. The obtained data show the near-field coupling among the meta-atoms and the impact of the electric field distribution from the excited meta-atom to neighbor meta-atoms. The observable LC resonance response is enhanced with an increase of numbers of meta-atoms. Furthermore, our approach also has a potential for visualizing the individual mode of meta-atom at different terahertz irradiation spots. These data can help us to understand the important role of the meta-atom in metamaterials and develop the novel terahertz components and devices such as active terahertz metamaterial and compact, high-sensitive bio-sensor devices. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Infrared, Millimeter, and Terahertz Waves Springer Journals

Direct Measurements of Terahertz Meta-atoms with Near-Field Emission of Terahertz Waves

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Publisher
Springer US
Copyright
Copyright © 2017 by Springer Science+Business Media, LLC
Subject
Engineering; Electrical Engineering; Electronics and Microelectronics, Instrumentation; Classical Electrodynamics
ISSN
1866-6892
eISSN
1866-6906
D.O.I.
10.1007/s10762-017-0417-7
Publisher site
See Article on Publisher Site

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