title: Stacked optical antennas for plasmon propagation in a 5 nm-confined cavity.
abstract: The sub-wavelength concentration and propagation of electromagnetic energy are two complementary aspects of plasmonics that are not necessarily co-present in a single nanosystem. Here we exploit the strong nanofocusing properties of stacked optical antennas in order to highly concentrate the electromagnetic energy into a 5 nm metal-insulator-metal (MIM) cavity and convert free radiation into guided modes. The proposed nano-architecture combines the concentration properties of optical nanoantennas with the propagation capability of MIM systems, paving the way to highly miniaturized on-chip plasmonic waveguiding.
authors.affiliation: 1] Istituto Italiano di Tecnologia, via Morego 30, I-16163 Genova, Italy [2] Università degli Studi di Genova, 16145 Genova, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Saeed
authors.affiliation: 1] Istituto Italiano di Tecnologia, via Morego 30, I-16163 Genova, Italy [2] Università degli Studi di Genova, 16145 Genova, Italy.
authors.forename: S
authors.initials: S
authors.lastname: Panaro
authors.affiliation: Istituto Italiano di Tecnologia, via Morego 30, I-16163 Genova, Italy.
authors.forename: R Proietti
authors.initials: RP
authors.lastname: Zaccaria
authors.affiliation: 1] Istituto Italiano di Tecnologia, via Morego 30, I-16163 Genova, Italy [2] Università degli Studi di Genova, 16145 Genova, Italy.
authors.forename: W
authors.initials: W
authors.lastname: Raja
authors.affiliation: Istituto Italiano di Tecnologia, via Morego 30, I-16163 Genova, Italy.
authors.forename: C
authors.initials: C
authors.lastname: Liberale
authors.affiliation: Istituto Italiano di Tecnologia, via Morego 30, I-16163 Genova, Italy.
authors.forename: M
authors.initials: M
authors.lastname: Dipalo
authors.affiliation: Istituto Italiano di Tecnologia, via Morego 30, I-16163 Genova, Italy.
authors.forename: G C
authors.initials: GC
authors.lastname: Messina
authors.affiliation: 1] Istituto Italiano di Tecnologia, via Morego 30, I-16163 Genova, Italy [2] Università degli Studi di Genova, 16145 Genova, Italy.
authors.forename: H
authors.initials: H
authors.lastname: Wang
authors.affiliation: Istituto Italiano di Tecnologia, via Morego 30, I-16163 Genova, Italy.
authors.forename: F
authors.initials: F
authors.lastname: De Angelis
authors.affiliation: Istituto Italiano di Tecnologia, via Morego 30, I-16163 Genova, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Toma