Localized Surface Plasmon Resonance in Metamaterials Composed of As 1- z Sb z Semimetal Nanoparticles in Al x Ga 1- x As 1- y Sb y Semiconductor Matrix.

We analyze the possibility to realize a localized surface plasmon resonance in metamaterials composed of As1-zSbz nanoparticles embedded in an AlxGa1-xAs1-ySby semiconductor matrix. To this end, we perform ab initio calculations of the dielectric function of the As1-zSbz materials. Changing the chemical composition z , we trace the evolution of the band structure, dielectric function, and loss function. In terms of the Mie theory, we calculate the polarizability and optical extinction of a system of As1-zSbz nanoparticles in an AlxGa1-xAs1-ySby environment. We show a possibility to provide localized surface plasmon resonance near the band gap of the AlxGa1-xAs1-ySby semiconductor matrix by a built-in system of As1-zSbz nanoparticles strongly enriched by Sb. The results of our calculations are supported by available experimental data.