EFFECT OF SPECTRAL OVERLAP OF RESONANCES ON THE SWITCHING EFFICIENCY OF INFRARED HYBRID METAMATERIALS BASED ON VANADIUM DIOXIDE AND SILICON
N. A. Mironov1,2, A. E. Gayduk1
1Rzhanov Institute of Semiconductor Physics, Siberian Branch, Russian Academy of Sciences Department of Physics, Novosibirsk, Russia
2Novosibirsk State University, Novosibirsk, Russia
Keywords: metamaterial, vanadium dioxide, Mie resonance, plasmon resonance, all-optical switching
Abstract
The work is aimed at numerical simulation of electromagnetic characteristics of multiresonant metamaterials, consisting of microresonators made of vanadium dioxide and silicon designed to operate in the infrared range. The dependence of the spectral response on the metamaterial geometric parameters and reflection coefficient contrast during the semiconductor-metal transition in vanadium dioxide is analyzed. It is shown that the electromagnetic response in the infrared range is determined by the Mie resonances, as well as by the plasmon and quasi-guided resonances. Hybrid metamaterials on silicon substrates can ensure higher reflection coefficient switching contrast in a wider spectrum compared to similar structures on quartz substrates. Spectral dependencies of the switching power threshold for metamaterials on quartz and silicon substrates are determined.
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