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Proceedings Paper

Periodic nanostructures for tunable thin optics
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Paper Abstract

We report the realization and characterization of porous nanostructures where a periodic refractive index modulation is achieved by stacking layers with different nano-architectures. One multilayer photonic crystal has been fabricated starting from colloidal dispersion of silicon dioxide and zirconium dioxide using spin coating technique. Improved efficiency of Bragg reflectivity (up to 85%) has been obtained by a new bottom-up fabrication technique of photonic hierarchical nanostructures based on self-assembly from the gas-phase at low temperature whit a very thin (≈ 1 μm) photonic crystal devices. Due to the high porosity, these systems can be infiltrated with nematic liquid crystals leading to tuning of the Bragg reflection band by applying low voltages to the structure.

Paper Details

Date Published: 20 August 2015
PDF: 12 pages
Proc. SPIE 9558, Nanostructured Thin Films VIII, 95580O (20 August 2015); doi: 10.1117/12.2187050
Show Author Affiliations
L. Criante, Istituto Italiano di Tecnologia (Italy)
Univ. Politecnica delle Marche (Italy)
F. Di Fonzo, Istituto Italiano di Tecnologia (Italy)
F. Fumagalli, Istituto Italiano di Tecnologia (Italy)
G. Lanzani, Istituto Italiano di Tecnologia (Italy)
Politecnico di Milano (Italy)
L. Passoni, Istituto Italiano di Tecnologia (Italy)
Politecnico di Milano (Italy)
F. Scotognella, Istituto Italiano di Tecnologia (Italy)
Politecnico di Milano (Italy)
F. Simoni, Univ. Politecnica delle Marche (Italy)

Published in SPIE Proceedings Vol. 9558:
Nanostructured Thin Films VIII
Akhlesh Lakhtakia; Tom G. Mackay; Motofumi Suzuki, Editor(s)

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