Using direct nanoimprinting of ferroelectric films to prepare devices exhibiting bi-directionally tunable surface plasmon resonances

Abstract

In this paper, we describe an imprint method for the fabrication of bi-directionally tunable surface plasmon resonance (SPR) filters. A periodic metal/ferroelectric film stack exhibiting SPR phenomena was directly imprinted using a sharp mold without the need for a polymer-based resist. Both the refractive index of the surrounding lead zirconate titanate (PZT) films and the period of the textured PZT/metal/PZT structure were dependent upon both the absolute value and sign of the applied potential. The SPR wavelength of the PZT/gold/PZT-based tunable filter varied over a range of greater than 100 nm when applying potentials ranging from 0 to -15 V. This imprinting method has great potential for use in the fabrication of tunable optical filters without the need for complicated processes or specific materials.

A mechanically tunable plasmonic structure composed of a monolayer array of metal-capped colloidal spheres on an elastomeric substrate

“…The tunability of plasmonic structures can significantly expand their application scope. Up to now, several tuning mechanisms have been proposed, including electrical [5], thermal [6], ferroelectric [7], and mechanical [8] tuning. Except for mechanical tuning, other tuning mechanisms offer a rather small spectral range of tuning.…”

Enhancement of Photocurrent in Ferroelectric Films Via the Incorporation of Narrow Bandgap Nanoparticles

“…Metallic silver was used as a target material, due to non-toxicity and excellent chemical compatibility with other oxide materials. [15][16][17] The oxidation of Ag particles lead to the stabilization of Ag 2 O particles having a bandgap of ∼1.30 eV. Silver oxide, as Ag 2 O, is an ideal candidate for visible light absorption.…”

Micrometer and nanometer-scale parallel patterning of ceramic and organic–inorganic hybrid materials

“…4. 101,102 In comparison with a single-layer PZT film, the profile in the bi-layer PZT/Au was much deeper and clearer. Apparently the soft gold cover layer helps to shape the PZT film.…”