We present the electric field-induced tuning of the light transmission in a photonic crystal device. The device, with alternating layers of Silver and Titanium dioxide nanoparticles, shows a shift of around 10 nm for an applied voltage of 10 V. An accumulation of charges at the Silver/TiO2 interface due to electric field leads to an increase of the number of charges contributing to the plasma frequency in Silver. This results in a blue shift of the Silver plasmon band, with concomitant blue shift of the photonic band gap as a result of the decrease in the Silver dielectric function.
Eduardo Aluicio-Sarduy, Simone Callegari, Diana Gisell Figueroa del Valle, Andrea Desii, Ilka Kriegel, and Francesco Scotognella, "Structural color tuning in a Ag/TiO2 nanoparticle one-dimensional photonic crystal induced by electric field," Proc. SPIE 10112, Photonic and Phononic Properties of Engineered Nanostructures VII, 101120Q (Presented at SPIE OPTO: January 31, 2017; Published: 20 February 2017); https://doi.org/10.1117/12.2251526.
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