Open AccessSurface plasmons in terahertz metamaterials
Author(s) -
Guillermo P. Acuna,
Stephan F. Heucke,
F. Kuchler,
Hou-Tong Chen,
Antoinette J. Taylor,
R. Kersting
Publication year - 2008
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.16.018745
Subject(s) - terahertz radiation , metamaterial , optics , surface plasmon , split ring resonator , plasmon , terahertz spectroscopy and technology , transformation optics , surface plasmon polariton , materials science , optoelectronics , physics
We characterize terahertz metamaterials by applying apertureless near-field microscopy with a bandwidth that covers the entire spectral response of the structures. The observations agree with the interpretation of the fundamental mode of the metamaterial. But the high frequency resonance shows properties that deviate from the common interpretation. We show that the high frequency response is governed by surface Plasmon excitations, which have a comparable oscillator strength as the fundamental mode.