探索局部化的ENZ共振及其在超散射,宽带隐形性和可调散射中的作用
Andriy E Serebryannikov1, Ekmel Ozbay2,3
1Division of Physics of Nanostructures, ISQI, Faculty of Physics, Adam Mickiewicz University, 61-614, Poznan, Poland. andser@amu.edu.pl.
Scientific reports
|January 18, 2024
概括
这项研究探讨了薄壁圆柱体中局部化的epsilon-near-zero (ENZ) 共振,并将其与局部化的表面等离子共振 (LSPRs) 进行比较. 研究人员发现了不同的散射行为和使用这些共振的可调可视隐形隐蔽的潜力.
科学领域:
- * 物理学,特别是电磁学和光学.
- * 材料科学,专注于等离子体和超材料的特性.
背景情况:
- *局部表面等离子体共振 (LSPRs) 和它们在异常散射现象 (如超散射和隐形) 中的作用是众所周知的.
- * 然而,局部的近零 (ENZ) 共振的存在和特征需要进一步研究.
研究的目的:
- * 探索局部ENZ共振的存在,外观和贡献.
- *为了比较局部ENZ共振与LSPR在薄壁圆柱体中的分散材料.
- * 调查超散射模式的近距离和远距离场特征.
主要方法:
- * 理论分析和数值模拟由有损失和损失补偿的分散材料组成的薄壁气.
- * 在零允许性制度附近对局部ENZ共振的研究.
- *超散射模式的特征及其与ENZ模式的区别.
主要成果:
- *本地化的ENZ共振被证实存在于零允许性 (负允许性) 制度附近.
- *从LSPR和局部ENZ共振中分辨出散射模式,可以通过场特征和散射机制来区分.
- *损耗显著影响散射,抑制高Q模式,并使损耗材料的隐形范围更广.
结论:
- *与LSPR相比,局部化的ENZ共振提供了不同的散射特性,在可调可视的隐形中具有潜在的应用.
- * 材料损失在实现宽带隐形性方面发挥着至关重要的作用,抑制了共振散射.
- * 观察到的超散射现象可能可以在使用低损耗自然材料的人工结构中重现.
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