21 September 2017 Experiment of synthetic Weyl points in optical regime (Conference Presentation)
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Weyl fermions have not been found in nature as elementary particles, but they emerge as nodal points in the band structure of electronic and classical wave crystals. Novel phenomena such as Fermi arcs and chiral anomaly have fueled the interest in these topological points which are frequently perceived as monopoles in momentum space. We demonstrate that generalized Weyl points can exist in a parameter space and we report the first observation of such nodal points in one-dimensional photonic crystals in the optical range. The reflection phase inside the band gap of a truncated photonic crystal exhibits vortexes in the parameter space where the Weyl points are defined and they share the same topological charges as the Weyl points. These vortexes also guarantee the existence of interface states, the trajectory of which can be understood as “Fermi arcs” emerging from the Weyl nodes.
Conference Presentation
© (2017) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Hui Liu, Hui Liu, Qiang Wang, Qiang Wang, Meng Xiao, Meng Xiao, Shi Ning Zhu, Shi Ning Zhu, Che Ting Chan, Che Ting Chan, } "Experiment of synthetic Weyl points in optical regime (Conference Presentation)", Proc. SPIE 10343, Metamaterials, Metadevices, and Metasystems 2017, 103431M (21 September 2017); doi: 10.1117/12.2273637; https://doi.org/10.1117/12.2273637


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