title: Programmable Extreme Chirality in the Visible by Helix-Shaped Metamaterial Platform.
abstract: The capability to fully control the chiro-optical properties of metamaterials in the visible range enables a number of applications from integrated photonics to life science. To achieve this goal, a simultaneous control over complex spatial and localized structuring as well as material composition at the nanoscale is required. Here, we demonstrate how circular dichroic bands and optical rotation can be effectively and independently tailored throughout the visible regime as a function of the fundamental meta-atoms properties and of their three dimensional architecture in a the helix-shaped metamaterials. The record chiro-optical effects obtained in the visible range are accompanied by an additional control over optical efficiency, even in the plasmonic context. These achievements pave the way toward fully integrated chiral photonic devices.
authors: CNR NANOTEC- Istituto di Nanotecnologia, Polo di Nanotecnologia , c/o Campus Ecotekne, via Monteroni, I-73100 Lecce, Italy.|Dipartimento Mat-Fis Ennio De Giorgi, Università del Salento , I-73100 Lecce, Italy.
authors: Marco
authors: M
authors: Esposito
authors: CNR NANOTEC- Istituto di Nanotecnologia, Polo di Nanotecnologia , c/o Campus Ecotekne, via Monteroni, I-73100 Lecce, Italy.
authors: Vittorianna
authors: V
authors: Tasco
authors: CNR NANOTEC- Istituto di Nanotecnologia, Polo di Nanotecnologia , c/o Campus Ecotekne, via Monteroni, I-73100 Lecce, Italy.|Dipartimento Mat-Fis Ennio De Giorgi, Università del Salento , I-73100 Lecce, Italy.
authors: Francesco
authors: F
authors: Todisco
authors: CNR NANOTEC- Istituto di Nanotecnologia, Polo di Nanotecnologia , c/o Campus Ecotekne, via Monteroni, I-73100 Lecce, Italy.
authors: Massimo
authors: M
authors: Cuscunà
authors: Dipartimento D.I.E.T., "Sapienza: Università di Roma" , Via Eudossiana 18, I-00184 Rome, Italy.
authors: Alessio
authors: A
authors: Benedetti
authors: CNR-IMM Sezione di Catania , Strada VIII, 5, I-95121 Catania, Italy.
authors: Mario
authors: M
authors: Scuderi
authors: CNR-IMM Sezione di Catania , Strada VIII, 5, I-95121 Catania, Italy.
authors: Giuseppe
authors: G
authors: Nicotra
authors: CNR NANOTEC- Istituto di Nanotecnologia, Polo di Nanotecnologia , c/o Campus Ecotekne, via Monteroni, I-73100 Lecce, Italy.
authors: Adriana
authors: A
authors: Passaseo
keywords: Chiral metamaterials; circular dichroism; dielectric chiral metamaterials; optical rotation; plasmonics