Journal
JOURNAL OF PHYSICAL CHEMISTRY C
Volume 114, Issue 16, Pages 7299-7301Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jp908921y
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Funding
- Deutsche Forschungsgemeinschaft (DFG) [Pu 193/9]
- Ministry of Education, Culture, Sports, Science, and Technology (MEXT)
- World Premier International Research Center (WPI) Initiative on Materials Nanoarchitectonics, MEXT, Japan
- Heidelberg Graduate School of Fundamental Physics
- Excellence Initiative of the German federal and state governments
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Resonant coupling between the plasmonic excitation of gold nanoantennas and phonon polaritons of a dielectric substrate-surface layer of about 3 nm thickness produces significant Fano-type signals from that layer in the infrared extinction spectrum of the fundamental antenna resonance. Compared to infrared transmittance spectra without gold antennas, the vibrational signal from the layer is about 1900 times enhanced and it is observed at surface phonon polariton frequencies of the layer, not at the transverse optical phonon frequency.
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