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Structural color tuning in 1D photonic crystals with electric field and magnetic field
Author(s): Eduardo Aluicio-Sarduy; Simone Callegari; Diana Gisell Figueroa del Valle; Andrea Desii; Ilka Kriegel; Francesco Scotognella
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Paper Abstract

A tuning of the light transmission properties of 1D photonic structures employing an external stimulus is very attracting and opens the way to the fabrication of optical switches for colour manipulation in sensing, lighting, and display technology. We present the electric field-induced tuning of the light transmission in a photonic crystal device, made by alternating layers of silver nanoparticles and titanium dioxide nanoparticles. We show a shift of around 10 nm for an applied voltage of 10 V. We ascribe the shift to an accumulation of charges at the silver/TiO2 interface due to electric field, resulting in an increase of the number of charges contributing to the plasma frequency in silver, giving rise to a blue shift of the silver plasmon band, with concomitant blue shift of the photonic band gap. The employment of a relatively low applied voltage gives the possibility to build a compact and low-cost device 1 . We also propose the fabrication of 1D photonic crystal and microcavities employing a magneto-optical material as TGG (Tb3Ga5O12). With these structures we can observe a shift of 22 nm with a magnetic field of 5 T, at low temperature (8 K). The option to tune the colour of a photonic crystal with magnetic field is interesting because of the possibility to realize contactless optical switches 2 . We also discuss the possibility to achieve the tuning of the photonic band gap with UV light in photonic crystals made with indium tin oxide (ITO).

Paper Details

Date Published: 17 May 2018
PDF: 7 pages
Proc. SPIE 10683, Fiber Lasers and Glass Photonics: Materials through Applications, 106830O (17 May 2018); doi: 10.1117/12.2303695
Show Author Affiliations
Eduardo Aluicio-Sarduy, Istituto Italiano di Tecnologia (Italy)
Politecnico de Milano (Italy)
Simone Callegari, Politecnico di Milano (Italy)
Diana Gisell Figueroa del Valle, Istituto Italiano di Tecnologia (Italy)
Politecnico de Milano (Italy)
Andrea Desii, Istituto Italiano di Tecnologia (Italy)
Ilka Kriegel, Istituto Italiano di Tecnologia (Italy)
Francesco Scotognella, Instituto Italiano di Tecnologia (Italy)
Politecnico de Milano (Italy)

Published in SPIE Proceedings Vol. 10683:
Fiber Lasers and Glass Photonics: Materials through Applications
Stefano Taccheo; Jacob I. Mackenzie; Maurizio Ferrari, Editor(s)

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