Published January 1, 2015
| Version v1
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Enhanced second harmonic generation from coupled asymmetric plasmonic metal nanostructures
Creators
- 1. Hacettepe Univ, Inst Nucl Sci, TR-06800 Ankara, Turkey
Description
We experimentally demonstrate that two coupled metal nanostructures (MNSs), a silver nanowire and bipyramid, can produce similar to 30 times enhanced second harmonic generation compared to the particles alone. We develop a simple theoretical model, presenting the path interference effects in the nonlinear response of coupled MNSs. We show that the reason for such an enhancement can be the occurrence of a Fano resonance due to the coupling of the converter MNS to the long-lived mode of the attached MNS.
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