Modal engineering of Surface Plasmons in apertured Au Nanoprisms.

Date publication

novembre 2015

Journal

Scientific reports

Auteurs

Membres identifiés du Cancéropôle Est :
Dr DUJARDIN Erik

Tous les auteurs :
Cuche A, Viarbitskaya S, Sharma J, Arbouet A, Girard C, Dujardin E

Lien Pubmed

https://www.ncbi.nlm.nih.gov/pubmed/26563677

Résumé

Crystalline gold nanoprisms of sub-micrometric size sustain high order plasmon modes in the visible and near infrared range that open a new realm for plasmon modal design, integrated coplanar devices and logic gates. In this article, we explore the tailoring of the surface plasmon local density of states (SP-LDOS) by embedding a single defect, namely a small hole, carved in the platelet by focused ion beam (FIB). The change in the SP-LDOS of the hybrid structure is monitored by two-photon luminescence (TPL) microscopy. The dependency of the two-dimensional optical field intensity maps on the linear polarization of the tightly focused femtosecond laser beam reveals the conditions for which the hole defect significantly affects the initial modes. A detailed numerical analysis of the spectral characteristics of the SP-LDOS based on the Green dyadic method clearly indicates that the hole size and location can be exploited to tune or remove selected SP modes.

Référence

Sci Rep. 2015 11 13;5:16635