Measurement of a Topological Edge Invariant in a Microwave Network

We report on the measurement of topological invariants in an electromagnetic topological insulator analog formed by a microwave network, consisting of the winding numbers of scattering matrix eigenvalues. The experiment can be regarded as a variant of a topological pump, with nonzero winding implyin...

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Bibliographic Details
Main Authors: Wenchao Hu, Jason C. Pillay, Kan Wu, Michael Pasek, Perry Ping Shum, Y. D. Chong
Format: Article
Language:English
Published: American Physical Society 2015-02-01
Series:Physical Review X
Online Access:http://doi.org/10.1103/PhysRevX.5.011012