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International audienceThe paper reports on surface plasmon resonance (SPR) studies of silver (Ag) and gold (Au) interfaces coated with thin indium tin oxide (ITO) layers. The ITO thin films were deposited using radio frequency sputtering at ambient temperature, resulting in the formation of chemically and optically stable Ag/ITO and Au/ITO interfaces. The advantage of Ag/ITO multilayers over Au and Au/ITO interfaces for SPR refractive index sensing is discussed in terms of sensitivity. Furthermore, the Ag/ITO interface offers the possibility for SPR studies in the presence of absorbing dielectrics, such as polypyrrole thin films

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International audienceA coplanar waveguide (CPW) stub resonator has been fabricated on a pulsed-laser deposited KTa(0.5)Nb(0.5)O(3) (KTN) thin film (600 nm-thick) onto a r-plane sapphire substrate. It was designed to operate at 10 GHz when the applied bias voltage is zero. We show experimentally that the resonance frequency is shifted by 44% under a 70 kV/cm DC applied electric field. In addition, the dielectric characteristics of the KTN film have been assessed through post-processed measurements of CPW 50-Omega transmission lines using the conformal mapping method