title: Silicon nanowire and carbon nanotube hybrid for room temperature multiwavelength light source.
abstract: The realization of an innovative hybrid light source operating at room temperature, obtained by embedding a carbon nanotube (CNT) dispersion inside a Si nanowire (NW) array is reported. The NW/CNT system exhibits a peculiar photoluminescence spectrum, consisting of a wide peak, mainly observed in the visible range, due to quantum confined Si NWs, and of several narrower IR peaks, due to the different CNT chiralities present in the dispersion. The detailed study of the optical properties of the hybrid system evidences that the ratio between the intensity of the visible and the IR emissions can be varied within a wide range by changing the excitation wavelength or the CNT concentration; the conditions leading to the prevalence of one signal with respect to the other are identified. The multiplicity of emission spectra obtainable from this composite material opens new perspectives for Si nanostructures as active medium in light sources for Si photonics applications.
authors.affiliation: IPCF-CNR, viale F. Stagno d'Alcontres 37, 98158 Messina, Italy.|MATIS IMM-CNR, via S. Sofia, 64, 95123 Catania, Italy.|Dipartimento di Fisica e Astronomia, Università di Catania, via S. Sofia, 64, 95123 Catania, Italy.
authors.forename: Maria Josè
authors.initials: MJ
authors.lastname: Lo Faro
authors.affiliation: MATIS IMM-CNR, via S. Sofia, 64, 95123 Catania, Italy.
authors.forename: Cristiano
authors.initials: C
authors.lastname: D'Andrea
authors.affiliation: IPCF-CNR, viale F. Stagno d'Alcontres 37, 98158 Messina, Italy.
authors.forename: Elena
authors.initials: E
authors.lastname: Messina
authors.affiliation: IPCF-CNR, viale F. Stagno d'Alcontres 37, 98158 Messina, Italy.
authors.forename: Barbara
authors.initials: B
authors.lastname: Fazio
authors.affiliation: Dipartimento di Fisica e Astronomia, Università di Catania, via S. Sofia, 64, 95123 Catania, Italy.
authors.forename: Paolo
authors.initials: P
authors.lastname: Musumeci
authors.affiliation: Dipartimento di Fisica e Astronomia, Università di Catania, via S. Sofia, 64, 95123 Catania, Italy.
authors.forename: Riccardo
authors.initials: R
authors.lastname: Reitano
authors.affiliation: MATIS IMM-CNR, via S. Sofia, 64, 95123 Catania, Italy.
authors.forename: Giorgia
authors.initials: G
authors.lastname: Franzò
authors.affiliation: IPCF-CNR, viale F. Stagno d'Alcontres 37, 98158 Messina, Italy.
authors.forename: Pietro Giuseppe
authors.initials: PG
authors.lastname: Gucciardi
authors.affiliation: IPCF-CNR, viale F. Stagno d'Alcontres 37, 98158 Messina, Italy.
authors.forename: Cirino
authors.initials: C
authors.lastname: Vasi
authors.affiliation: MATIS IMM-CNR, via S. Sofia, 64, 95123 Catania, Italy.|Dipartimento di Fisica e Astronomia, Università di Catania, via S. Sofia, 64, 95123 Catania, Italy.|Scuola Superiore di Catania, Università di Catania, via Valdisavoia, 9, 95123 Catania, Italy.
authors.forename: Francesco
authors.initials: F
authors.lastname: Priolo
authors.affiliation: MATIS IMM-CNR, via S. Sofia, 64, 95123 Catania, Italy.
authors.forename: Fabio
authors.initials: F
authors.lastname: Iacona
authors.affiliation: IPCF-CNR, viale F. Stagno d'Alcontres 37, 98158 Messina, Italy.
authors.forename: Alessia
authors.initials: A
authors.lastname: Irrera