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arXiv · 1204.6400

Drastic Changes in Dielectric Function of Silver Under dc Voltage

B. V. Kryzhanovsky·A. N. Palagushkin·S. A. Prokopenko·A. P. Sergeev·A. O. Melikyan
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Abstract

Significant changes of the relative permittivity of a silver film have been detected using the surface plasmon resonance (SPR) method when a constant electric field is applied to a MDM (metal-dielectric-metal) nanostructure. The structure looks like a capacitor with a 177-nm dielectric corundum film placed between two silver films 49nm and 37nm thick. The effect manifests itself as a noticeable change of the reflectivity of the structure when the voltage of up to 30V is applied to the electrodes. We have a good agreement between the theory and experiment only if we suppose that the optical parameters of anode and cathode silver films change differently and the Al_2O_3 film absorbs the incident light. The refraction coefficient of the cathode silver layer is shown to become zero when the applied voltage is above 16V.

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B. V. Kryzhanovsky, A. N. Palagushkin, S. A. Prokopenko, A. P. Sergeev, A. O. Melikyan. 2012-05-05. Drastic Changes in Dielectric Function of Silver Under dc Voltage. https://arxiv.org/abs/1204.6400

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