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Proceedings Paper

Experiment of synthetic Weyl points in optical regime (Conference Presentation)
Author(s): Hui Liu; Qiang Wang; Meng Xiao; Shi Ning Zhu; Che Ting Chan

Paper Abstract

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.

Paper Details

Date Published: 21 September 2017
Proc. SPIE 10343, Metamaterials, Metadevices, and Metasystems 2017, 103431M (21 September 2017); doi: 10.1117/12.2273637
Show Author Affiliations
Hui Liu, Nanjing Univ. (China)
Qiang Wang, Nanjing Univ. (China)
Meng Xiao, Stanford Univ. (United States)
Shi Ning Zhu, Nanjing Univ. (China)
Che Ting Chan, Hong Kong Univ. of Science and Technology (Hong Kong, China)

Published in SPIE Proceedings Vol. 10343:
Metamaterials, Metadevices, and Metasystems 2017
Nader Engheta; Mikhail A. Noginov; Nikolay I. Zheludev, Editor(s)

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