Continuous evolution of Fermi arcs in a minimal ideal photonic Weyl medium

IF 3.5 3区医学 Q2 CHEMISTRY, MEDICINAL

ACS Medicinal Chemistry Letters Pub Date : 2024-09-27 DOI:10.1038/s41377-024-01632-w

Yachao Liu, Mingwei Wang, Yongqing Huang, Guo Ping Wang, Shuang Zhang

引用次数: 0

Abstract

Propagation properties of electromagnetic waves in an optical medium are mainly determined by the contour of equal-frequency states in \({\boldsymbol{k}}\)-space. In photonic Weyl media, the topological surface waves lead to a unique open arc of the equal-frequency contour, called the Fermi arc. However, for most realistic Weyl systems, the shape of Fermi arcs is fixed due to the constant impedance of the surrounding medium, making it difficult to manipulate the surface wave. Here we demonstrate that by adjusting the thickness of the air layer sandwiched between two photonic Weyl media, the shape of the Fermi arc can be continuously changed from convex to concave. Moreover, we show that the concave Fermi-arc waves can be used to achieve topologically protected electromagnetic pulling forces over a broad range of angles in the air layer. Our finding offers a generally applicable strategy to shape the Fermi arc in photonic Weyl media.

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最小理想光子韦尔介质中费米弧的连续演化

电磁波在光学介质中的传播特性主要由\({\boldsymbol{k}}\)空间中的等频态轮廓决定。在光子韦尔介质中，拓扑表面波会导致等频态轮廓线上出现一个唯一的开放弧，即费米弧。然而，对于大多数现实的 Weyl 系统，由于周围介质的阻抗恒定，费米弧的形状是固定的，因此很难操纵表面波。在这里，我们证明了通过调整夹在两个光子韦尔介质之间的空气层厚度，费米弧的形状可以从凸形不断变为凹形。此外，我们还证明，凹面费米弧波可用于在空气层的广泛角度范围内实现拓扑保护电磁拉力。我们的发现为在光子韦尔介质中塑造费米弧提供了一种普遍适用的策略。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

ACS Medicinal Chemistry Letters CHEMISTRY, MEDICINAL-

CiteScore

7.30

自引率

2.40%

发文量

328

审稿时长

1 months

期刊介绍： ACS Medicinal Chemistry Letters is interested in receiving manuscripts that discuss various aspects of medicinal chemistry. The journal will publish studies that pertain to a broad range of subject matter, including compound design and optimization, biological evaluation, drug delivery, imaging agents, and pharmacology of both small and large bioactive molecules. Specific areas include but are not limited to: Identification, synthesis, and optimization of lead biologically active molecules and drugs (small molecules and biologics) Biological characterization of new molecular entities in the context of drug discovery Computational, cheminformatics, and structural studies for the identification or SAR analysis of bioactive molecules, ligands and their targets, etc. Novel and improved methodologies, including radiation biochemistry, with broad application to medicinal chemistry Discovery technologies for biologically active molecules from both synthetic and natural (plant and other) sources Pharmacokinetic/pharmacodynamic studies that address mechanisms underlying drug disposition and response Pharmacogenetic and pharmacogenomic studies used to enhance drug design and the translation of medicinal chemistry into the clinic Mechanistic drug metabolism and regulation of metabolic enzyme gene expression Chemistry patents relevant to the medicinal chemistry field.