Photonic Hall effect and helical Zitterbewegung in a synthetic Weyl system  

作　　者：Weimin Ye Yachao Liu Jianlong Liu Simon A.R.Horsley Shuangchun Wen Shuang Zhang 

机构地区：[1]College of Advanced Interdisciplinary Studies,National University of Defense Technology,410073 Changsha,China [2]Key Laboratory for Micro/Nano Optoelectronic Devices of Ministry of Education,School of Physics and Electronics,Hunan University,410082 Changsha,China [3]School of Physics&Astronomy,University of Birmingham,Birmingham B152TT,UK [4]Department of Physics,Harbin Institute of Technology,150001 Harbin,China [5]Department of Physics and Astronomy,University of Exeter,Exeter EX44QL,UK

出　　处：《Light(Science & Applications)》2019年第1期758-765,共8页光（科学与应用)（英文版）

基　　金：supported by ERC Consolidator Grant(TOPOLOGICAL);the National Science Foundation of China(11374367,11574079);funding provided by the Royal Society and TATA(RPG-2016-186).

摘　　要：Systems supporting Weyl points have gained increasing attention in condensed physics,photonics and acoustics due to their rich physics,such as Fermi arcs and chiral anomalies.Acting as sources or drains of Berry curvature,Weyl points exhibit a singularity of the Berry curvature at their core.It is,therefore,expected that the induced effect of the Berry curvature can be dramatically enhanced in systems supporting Weyl points.In this work,we construct synthetic Weyl points in a photonic crystal that consists of a honeycomb array of coupled rods with slowly varying radii along the direction of propagation.The system possesses photonic Weyl points in the synthetic space of two momenta plus an additional physical parameter with an enhanced Hall effect resulting from the large Berry curvature in the vicinity of the Weyl point.Interestingly,a helical Zitterbewegung(ZB)is observed when the wave packet traverses very close to a Weyl point,which is attributed to the contribution of the non-Abelian Berry connection arising from the near degenerate eigenstates.

关 键 词：CURVATURE BERRY HELICAL 

分 类 号：O17[理学—数学]