Naslov
Boosting Fano resonances in single layered concentric core–shell particles

Autori
Sancho-Parramon, Jordi ; Jelovina, Denis

Izvornik
Nanoscale (2040-3364) 6 (2014), 22; 13555-13564

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
surface plasmon; Fano resonance; metal nanoparticles; cylindrical vector beams

Sažetak
Efficient excitation of Fano resonances in plasmonic systems usually requires complex nano-structure geometries and some degree of symmetry breaking. However, a single-layered concentric core–shell particle presents inherent Fano profiles in the scattering spectra when sphere and cavity modes spectrally overlap. Weak hybridization and suitable choice of core and shell materials gives rise to strong electric dipolar Fano resonances in these systems and retardation effects can result in resonances of higher multipolar order or of magnetic type. Furthermore, suitable tailoring of illumination conditions leads to an enhancement of the Fano resonance by quenching of unwanted electromagnetic modes. Overall, it is shown that single layered core–shell particles can act as robust Fano resonators.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA