期刊
OPTICS EXPRESS
卷 16, 期 23, 页码 18745-18751出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.16.018745
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资金
- Nanosystems Initiative Munich (NIM)
- International Doctorate Program Nano-Bio-Technology (IDK-NBT)
- Deutsche Forschungsgemeinschaft (DFG) [KE516/1-1]
- Los Alamos National Laboratory
- Center for Integrated Nanotechnologies
- U.S. Department of Energy
- Office of Basic Energy Sciences Nanoscale Science Research Center
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. (c) 2008 Optical Society of America
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