|Title||Enhanced second harmonic generation from coupled asymmetric plasmonic metal nanostructures|
|Publication Type||Journal Article|
|Year of Publication||2015|
|Authors||Yildiz, B, Tasgin, MEmre, Abak, MKurtulus, Coskun, S, Unalan, HEmrah, Bek, A|
|Journal||Journal of Optics|
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.