title: Enhanced Third-Harmonic Generation from a Metal/Semiconductor Core/Shell Hybrid Nanostructure.
abstract: Nonlinear optical processes can be dramatically enhanced via the use of localized surface plasmon modes in metal nanoparticles. Here we show how more elaborate structures, based on shape-controlled Au/Cu2O core/shell nanostructures, enable further enhancement of the nanoparticle third-harmonic scattering cross-section. The semiconducting component takes a twofold role in this structure, both providing a knob to tune the resonant frequency of the gold plasmon and providing resonant enhancement by virtue of its excitonic states. The advantages and deficiencies of using such core/shell metal/semiconductor structures are discussed.
authors.affiliation: Department of Physics of Complex Systems, Weizmann Institute of Science , Rehovot 76100, Israel.
authors.forename: Omri
authors.initials: O
authors.lastname: Bar-Elli
authors.affiliation: Department of Physics of Complex Systems, Weizmann Institute of Science , Rehovot 76100, Israel.
authors.forename: Eran
authors.initials: E
authors.lastname: Grinvald
authors.affiliation: Department of Physics of Complex Systems, Weizmann Institute of Science , Rehovot 76100, Israel.
authors.forename: Noga
authors.initials: N
authors.lastname: Meir
authors.affiliation: Department of Physics of Complex Systems, Weizmann Institute of Science , Rehovot 76100, Israel.
authors.forename: Lior
authors.initials: L
authors.lastname: Neeman
authors.affiliation: Department of Physics of Complex Systems, Weizmann Institute of Science , Rehovot 76100, Israel.
authors.forename: Dan
authors.initials: D
authors.lastname: Oron
keywords: core/shell nanoparticles; plasmonics; third-harmonic generation