Metamaterials with a refractive index of zero exhibit properties that are important for integrated optics. Possessing an infinite effective wavelength and zero spatial phase change, zero-index metamaterials may be especially useful for routing on-chip photonic processes and reducing the footprint of nonlinear interactions. Zero-index has only been achieved recently in an integrated platform through a Dirac-cone dispersion, enabling some of these more exciting applications in an integrated platform. This paper presents an overview of Dirac-cone zero-index metamaterials, including the fundamental physics, history and demonstration in the optical regime, as well as current challenges and future directions.

中文翻译：

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使用狄拉克锥零折射率超材料操纵光流

折射率为零的超材料表现出对集成光学很重要的特性。拥有无限有效波长和零空间相变，零指数超材料可能对于路由片上光子过程和减少非线性相互作用的足迹特别有用。零指数最近才通过狄拉克锥色散在集成平台中实现，从而在集成平台中实现了一些更令人兴奋的应用。本文概述了狄拉克锥零折射率超材料，包括光学领域的基础物理学、历史和演示，以及当前的挑战和未来的方向。