1.College of Electronics and Information Engineering, Shenzhen University, 518060 Shenzhen, China
2.School of Physics & Astronomy, University of Birmingham, Birmingham B15 2TT, UK
3.The Blackett Laboratory, Department of Physics, Imperial College London, London SW7 2AZ, UK
4.Department of Physics, University of Hong Kong, Hong Kong, China
5.Department of Electrical & Electronic Engineering, University of Hong Kong, Hong Kong, China
Guo Ping Wang (gpwang@szu.edu.cn)
John B. Pendry (j.pendry@imperial.ac.uk)
Shuang Zhang (shuzhang@hku.hk)
纸质出版日期:2022-10-31,
网络出版日期:2022-09-19,
收稿日期:2022-04-27,
修回日期:2022-08-17,
录用日期:2022-08-29
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All-angle reflectionless negative refraction with ideal photonic Weyl metamaterials[J]. LSA, 2022,11(10):2444-2450.
Liu, Y. C. et al. All-angle reflectionless negative refraction with ideal photonic Weyl metamaterials. Light: Science & Applications, 11, 2444-2450 (2022).
All-angle reflectionless negative refraction with ideal photonic Weyl metamaterials[J]. LSA, 2022,11(10):2444-2450. DOI: 10.1038/s41377-022-00972-9.
Liu, Y. C. et al. All-angle reflectionless negative refraction with ideal photonic Weyl metamaterials. Light: Science & Applications, 11, 2444-2450 (2022). DOI: 10.1038/s41377-022-00972-9.
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.
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