Beilstein J. Nanotechnol.2018,9, 2188–2197, doi:10.3762/bjnano.9.205
likely caused by distinct deviations of the gap geometry arising from the faceted structure of the applied colloidal AuNPs.
Keywords: atomistic plasmonics; dumbbell dimer antennas; electromagnetic field enhancement; light confinement; nanolens; nanoscale morphology; Introduction
The introduction of the
non-linear responses generated in these structures [39]. In addition, the asymmetry induces a cascade of the electromagnetic field enhancement towards the pointed end of the structure such that these structures are often discussed in terms of acting as a nanolens [10][40][41][42][43]. Although the
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Figure 1:
Tip-supported dumbbell antenna. (a) Calculated electromagnetic field distribution of a 80–40 nm AuN...