arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2102.09675cond-mat.mes-hallcond-mat.mtrl-sci
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库仑工程二维金属的等离子体波导

Plasmonic Waveguides from Coulomb-Engineered Two-Dimensional Metals

Zhihao Jiang, Stephan Haas, Malte Rösner

摘要:

库仑相互作用在原子级薄的材料中起着至关重要的作用。一方面,由于缺乏环境屏蔽,它们在分层系统中具有很强的长程作用。另一方面,它们可以通过周围的介电材料有效地调谐。因此,所有决定性地依赖于电子相互作用的确切结构的物理性质原则上都可以通过库仑工程从外部有效地控制和操纵。在这里,我们展示了如何使用这一概念在金属层状材料中创建全新的等离子体波导。我们详细讨论了如何介电结构的环境可以利用非侵入性地限制在一个均匀的金属2D系统的多体相互作用的修改等离子体激元激发。我们定义了这种机制的最佳能量范围,并证明了几个纳米内的等离子体约束。与传统的功能化机制相比,该方案依赖于纯粹的多体概念,并且不涉及对活性材料本身的任何直接修饰。

英文摘要:

Coulomb interactions play an essential role in atomically-thin materials. On one hand, they are strong and long-ranged in layered systems due to the lack of environmental screening. On the other hand, they can be efficiently tuned by means of surrounding dielectric materials. Thus all physical properties which decisively depend on the exact structure of the electronic interactions can be in principle efficiently controlled and manipulated from the outside via Coulomb engineering. Here, we show how this concept can be used to create fundamentally new plasmonic waveguides in metallic layered materials. We discuss in detail how dielectrically structured environments can be utilized to non-invasively confine plasmonic excitations in an otherwise homogeneous metallic 2D system by modification of its many-body interactions. We define optimal energy ranges for this mechanism and demonstrate plasmonic confinement within several nanometers. In contrast to conventional functionalization mechanisms, this scheme relies on a purely many-body concept and does not involve any direct modifications to the active material itself.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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