title: Plasmon resonance in individual nanogap electrodes studied using graphene nanoconstrictions as photodetectors.
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.
authors: Physics Department, Cornell University, Ithaca, New York 14853, United States.
authors: S-F
authors: SF
authors: Shi
authors: Xiaodong
authors: X
authors: Xu
authors: D C
authors: DC
authors: Ralph
authors: P L
authors: PL
authors: McEuen
mesh_terms: D004566:Electrodes; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006108:Graphite / Q000737:chemistry* / Q000528:radiation effects*; D008027:Light; D049329:Nanostructures / Q000737:chemistry* / Q000528:radiation effects; D036103:Nanotechnology / Q000295:instrumentation*; D010316:Particle Size; D010783:Photometry / Q000295:instrumentation*; D020349:Surface Plasmon Resonance / Q000295:instrumentation*
chemical_list: D006108:Graphite