All-angle reflectionless negative refraction with ideal photonic Weyl metamaterials.
All-angle reflectionless negative refraction with ideal photonic Weyl metamaterials.
复制标题
具有理想光子韦尔超材料的全角度无反射负折射
DOI：
10.1038/s41377-022-00972-9
复制
发表时间：
2022-09-19
影响因子：
19.4
通讯作者：
Zhang, Shuang
中科院分区：
文献类型：
--
作者：
Liu, Yachao;Wang, Guo Ping;Pendry, John B.;Zhang, Shuang
负折射是一种非自然的光学现象，其中入射波和折射波位于表面法线的同一侧，已经通过基于称为超材料的人工工程光子结构的负折射率介质的发明得到了证明。由于其在成像、非线性光学、电磁隐身等方面的潜在应用，受到了广泛的关注。然而，实现在所有角度下工作并具有完美透射的负折射是非常具有挑战性的。在这项工作中，利用拓扑光子学的最新发展，我们建议使用拓扑超材料实现所有入射角的无反射负折射。所提出的超材料具有两个拓扑电荷相反的外尔点。通过将超材料与完美电导体（PEC）或完美磁导体（PMC）连接，连接两个外尔点的费米弧可以采取具有正或负折射率的半圆的形式。重要的是，由于拓扑保护，在PEC和PMC覆盖区域之间的界面处没有反射，导致在边界处没有反射的全角度负折射的观察。我们的工作为操纵表面波的传播提供了一个新的平台，这可能会在集成光子器件的构建中找到应用。
Negative refraction, an unnatural optical phenomenon in which the incident and the refracted waves reside on the same side of the surface normal, has been demonstrated with the invention of negative index media based on artificially engineered photonic structures called metamaterials. It has received wide attention due to its potential applications in imaging, nonlinear optics, and electromagnetic cloaking. However, it is highly challenging to realize negative refraction operating at all angles and with the perfect transmission. In this work, leveraging the recent development in topological photonics, we propose to realize reflectionless negative refraction for all incident angles with a topological metamaterial. The proposed metamaterial possesses two Weyl points of opposite topological charges. By interfacing the metamaterial with a perfect electric conductor (PEC) or a perfect magnetic conductor (PMC), the Fermi arc connecting the two Weyl points can take the form of a half-circle possessing a positive or a negative refractive index. Importantly, due to the topological protection, there is no reflection at the interface between the PEC and PMC covered areas, leading to the observation of all-angle negative refraction without reflection at the boundary. Our work provides a new platform for manipulating the propagation of surface waves, which may find applications in the construction of integrated photonic devices.
登录
查看更多内容
影响因子：
16.6
作者：
Mortensen, N. A.;Raza, S.;Bozhevolnyi, S. I.
通讯作者：
Bozhevolnyi, S. I.
影响因子：
8.6
作者：
McMahon, Jeffrey M.;Gray, Stephen K.;Schatz, George C.
通讯作者：
Schatz, George C.
影响因子：
56.9
作者：
Lezec, Henri J.;Dionne, Jennifer A.;Atwater, Harry A.
通讯作者：
Atwater, Harry A.
外尔声子晶体中表面声波的拓扑负折射
影响因子：
64.8
作者：
He, Hailong;Qiu, Chunyin;Liu, Zhengyou
通讯作者：
Liu, Zhengyou
影响因子：
3.8
作者：
Luo, CY;Johnson, SG;Pendry, JB
通讯作者：
Pendry, JB