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 As [Formula: see text] Sb [Formula: see text] nanoparticles embedded in an Al [Formula: see text] Ga [Formula: see text] As [Formula: see text] Sb [Formula: see text] semiconductor matrix. To this end, we perform ab initio calculations of the dielectric function of the As [Formula: see text] Sb [Formula: see text] 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 As [Formula: see text] Sb [Formula: see text] nanoparticles in an Al [Formula: see text] Ga [Formula: see text] As [Formula: see text] Sb [Formula: see text] environment. We show a possibility to provide localized surface plasmon resonance near the band gap of the Al [Formula: see text] Ga [Formula: see text] As [Formula: see text] Sb [Formula: see text] semiconductor matrix by a built-in system of As [Formula: see text] Sb [Formula: see text] nanoparticles strongly enriched by Sb. The results of our calculations are supported by available experimental data.