Journal
APPLIED PHYSICS LETTERS
Volume 95, Issue 4, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3194154
Keywords
infrared detectors; monolayers; plasmonics; self-assembly
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Funding
- National Institutes of Health through the NIH Roadmap for Medical Research [PN2 EY018228]
- NSF Nanoscale Science and Engineering Center (NSEC) [CMMI-0751621]
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We report a surface enhanced molecular detection technique with zeptomole sensitivity that relies on resonant coupling of plasmonic modes of split ring resonators and infrared vibrational modes of a self-assembled monolayer of octadecanthiol molecules. Large near-field enhancements at the gap of split ring resonators allow for this resonant coupling when the molecular absorption peaks overlap spectrally with the plasmonic resonance. Electromagnetic simulations support experimental findings.
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