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Proceedings Paper

Ultrafast characterization of photonic topological edge modes (Conference Presentation)

Paper Abstract

Through systematically manipulating the couplings in the photonic lattice, the topological nature emerges associated with edge state dynamics. Here, we demonstrate a robust photonic zero mode sustained by a spatial non-Hermitian phase transition in a parity-time (PT) symmetric lattice despite the same topological order across the entire system and a flexible topological photonic lattice with multiple topologically nontrivial dispersion bands. Heterodyne measurements clearly reveal the ultrafast transport dynamics and energy of the edge states at a femtosecond scale, validating the designed topological features.

Paper Details

Date Published: 9 September 2019
Proc. SPIE 11081, Active Photonic Platforms XI, 110810F (9 September 2019); doi: 10.1117/12.2526795
Show Author Affiliations
Liang Feng, Univ. of Pennsylvania (United States)
Zhifeng Zhang, Univ. of Pennsylvania (United States)
Mingsen Pan, Univ. of Pennsylvania (United States)
Han Zhao, Univ. of Pennsylvania (United States)
Pei Miao, Univ. of Pennsylvania (United States)

Published in SPIE Proceedings Vol. 11081:
Active Photonic Platforms XI
Ganapathi S. Subramania; Stavroula Foteinopoulou, Editor(s)

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