Anomalous Quantum Hall Effect of Light in Bloch-Wave Modulated Photonic Crystals
Anomalous Quantum Hall Effect of Light in Bloch-Wave Modulated Photonic Crystals
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DOI：
10.1103/physrevlett.122.233904
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发表时间：
2019-06-14
影响因子：
8.6
通讯作者：
Wang, Yunkai
中科院分区：
文献类型：
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作者：
Fang, Kejie;Wang, Yunkai
有效磁场使包括光子在内的中性粒子的操纵成为可能。在大多数研究情况下，有效规范场是通过空间离散元件之间的模态耦合来定义的，例如光子的光谐振器和波导。在这里，在布洛赫波调制光子晶体的范例中，我们首次展示了通过Floquet波段工程在传统介质连续介质中为光子创建有效磁场。通过控制布洛赫波的相位和波矢量，我们证明了由于离域波干涉而具有不同拓扑带特征的光的反常量子霍尔效应。基于无腔结构，利用光子晶体中的引导共振可以增强布洛赫波调制，本研究为实现大尺度的有效磁场打开了大门，用于光束导向和具有破时反转对称性的拓扑光物质相。
Effective magnetic fields have enabled unprecedented manipulation of neutral particles including photons. In most studied cases, the effective gauge fields are defined through the phase of mode coupling between spatially discrete elements, such as optical resonators and waveguides in the case for photons. Here, in the paradigm of Bloch-wave modulated photonic crystals, we show the creation of effective magnetic fields for photons in conventional dielectric continua for the first time, via Floquet band engineering. By controlling the phase and wave vector of Bloch waves, we demonstrated the anomalous quantum Hall effect for light with distinct topological band features due to delocalized wave interference. Based on a cavity-free architecture, in which Bloch-wave modulations can be enhanced using guided resonances in photonic crystals, the study here opens the door to the realization of effective magnetic fields at large scales for optical beam steering and topological light-matter phases with broken time-reversal symmetry.