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arXiv 2007.01361physics.opticsphysics.app-ph
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连续介质和零折射率超材料中的束缚态

Bound States in Continuum and Zero-Index Metamaterials: A Review

Yu Peng, Shaolin Liao

摘要:

连续谱中的束缚态(BIC)是一种即使与连续谱的辐射波共存也能保持局域化的波,这些辐射波可以带走能量。它们的存在本身就违背了传统智慧。虽然BIC最早是在量子力学中提出的,但它们是一种普遍的波动现象,并且已经在电磁波、空气中的声波、水波和固体中的弹性波中得到了确认。这些态已经在广泛的材料系统中被研究,例如压电材料、介电光子晶体、光波导和光纤、量子点、石墨烯和拓扑绝缘体。在这篇综述中,我们描述了这一领域的最新进展,重点是导致BIC跨越看似非常不同的材料和波类型的物理机制。我们还讨论了实验实现,现有的应用和未来的工作方向。最后,我们提出了我们最近的努力,设计一种新型的硅(Si)的μ-近零(uNZ)的超材料,减少辐射损失,通过相消干涉的多个损失通道,导致在连续的束缚态。该设计由硅柱阵列组成。通过调整单胞的半径、间距和高度,可以消除面外辐射。

英文摘要:

Bound states in the continuum (BICs) are waves that remain localized even though they coexist with a continuous spectrum of radiating waves that can carry energy away. Their very existence defies conventional wisdom. Although BICs were first proposed in quantum mechanics, they are a general wave phenomenon and have since been identified in electromagnetic waves, acoustic waves in air, water waves and elastic waves in solids. These states have been studied in a wide range of material systems, such as piezoelectric materials, dielectric photonic crystals, optical waveguides and fibers, quantum dots, graphene and topological insulators. In this Review, we describe recent developments in this field with an emphasis on the physical mechanisms that lead to BICs across seemingly very different materials and types of waves. We also discuss experimental realizations, existing applications and directions for future work. At last, we present our recent effort to design a novel type of silicon (Si) based mu-Near-Zero (uNZ) metamaterials that reduces radiative loss through destructive interference of multiple loss channels, resulting in a bound state in the continuum. This design consists of Si pillars array. By adjusting the unit-cell dimensions including radius, pitch and height, we can eliminate the out-of-plane radiation.

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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