Ushanov Vitalii I, Eremeev Sergey V, Silkin Vyacheslav M, Chaldyshev Vladimir V
Ioffe Institute, 26 Politekhnicheskaya Str., 194021 Saint Petersburg, Russia.
Institute of Strength Physics and Materials Science, Siberian Branch, Russian Academy of Sciences, 634055 Tomsk, Russia.
Nanomaterials (Basel). 2024 Jan 12;14(2):0. doi: 10.3390/nano14020167.
We perform numerical modeling of the optical absorption spectra of metamaterials composed of systems of semimetal antimony nanoparticles embedded into AlxGa1-xAs semiconductor matrices. We reveal a localized surface plasmon resonance (LSPR) in these metamaterials, which results in a strong optical extinction band below, near, or above the direct band gap of the semiconductor matrices, depending on the chemical composition of the solid solutions. We elucidate the role of dielectric losses in AlxGa1-xAs, which impact the LSPR and cause non-plasmonic optical absorption. It appears that even a dilute system of plasmonic Sb nanoinclusions can substantially change the optical absorption spectra of the medium.
我们对由嵌入AlxGa1-xAs半导体基质中的半金属锑纳米颗粒系统组成的超材料的光吸收光谱进行了数值模拟。我们揭示了这些超材料中的局域表面等离子体共振（LSPR），这会导致在半导体基质的直接带隙以下、附近或以上出现一个强光学消光带，具体取决于固溶体的化学成分。我们阐明了AlxGa1-xAs中介电损耗的作用，其影响LSPR并导致非等离子体光吸收。结果表明，即使是稀有的等离子体锑纳米内含物系统也能显著改变介质的光吸收光谱。
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