Plasmon resonance in individual nanogap electrodes studied using graphene nanoconstrictions as photodetectors.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 21434673.
- Also identified by DOI 10.1021/nl200522t.
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Abstract
We achieve direct electrical readout of the wavelength and polarization dependence of the plasmon resonance in individual gold nanogap antennas by positioning a graphene nanoconstriction within the gap as a localized photodetector. The polarization sensitivities can be as large as 99%, while the plasmon-induced photocurrent enhancement is 2-100. The plasmon peak frequency, polarization sensitivity, and photocurrent enhancement all vary between devices, indicating the degree to which the plasmon resonance is sensitive to nanometer-scale irregularities.
Medical subject headings
- Electrodes
- Graphite
- Nanostructures
- Nanotechnology
- Photometry
- Surface Plasmon Resonance