Unveiling Influence of Dielectric Losses on the Localized Surface Plasmon Resonance in (Al,Ga)As:Sb Metamaterials

被引：1
作者：
Ushanov, Vitalii I. [1 ]
Eremeev, Sergey V. [2 ]
Silkin, Vyacheslav M. [3 ,4 ,5 ]
Chaldyshev, Vladimir V. [1 ]
机构：
[1] Ioffe Inst, 26 Politekhnicheskaya Str, St Petersburg 194021, Russia
[2] Russian Acad Sci, Inst Strength Phys & Mat Sci, Siberian Branch, Tomsk 634055, Russia
[3] Univ Pais Vasco UPV EHU, Fac Ciencias Quim, Dept Polimeros & Mat Avanzados Fis Quim & Tecnol, Apdo 1072, E-20080 San Sebastian, Spain
[4] Donostia Int Phys Ctr DIPC, Paseo Manuel Lardizabal 4, E-20018 San Sebastian, Spain
[5] Basque Fdn Sci, Ikerbasque, E-48009 Bilbao, Spain
来源：
NANOMATERIALS | 2024年 / 14卷 / 02期
基金：
俄罗斯科学基金会;
关键词：
metal-semiconductor metamaterials; nanoparticles; dielectric function; optical absorption; plasmon resonance; QUANTUM DOTS; NEAR-FIELD; ABSORPTION; GAAS;
D O I：
10.3390/nano14020167
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
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.
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页数：11
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