Experimental Realization of Parity-Time-Symmetric Flat Bands

Tobias Biesenthal; Mark Kremer; Matthias Heinrich; Alexander Szameit

doi:10.1364/CLEO_QELS.2020.FM2A.4

Conference on Lasers and Electro-Optics
OSA Technical Digest (Optica Publishing Group, 2020),
paper FM2A.4
•https://doi.org/10.1364/CLEO_QELS.2020.FM2A.4

Experimental Realization of Parity-Time-Symmetric Flat Bands

Tobias Biesenthal, Mark Kremer, Matthias Heinrich, and Alexander Szameit

CLEO: QELS_Fundamental Science 2020

Washington, DC United States
10–15 May 2020
ISBN: 978-1-943580-76-7

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Non-Hermitian and Topological Phenomena II (FM2A)

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T. Biesenthal, M. Kremer, M. Heinrich, and A. Szameit, "Experimental Realization of Parity-Time-Symmetric Flat Bands," in Conference on Lasers and Electro-Optics, OSA Technical Digest (Optica Publishing Group, 2020), paper FM2A.4.

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Abstract

We demonstrate experimentally dispersionless flat bands with parity-time symmetiy. To this end, we employ precisely tailored losses in laser-written waveguide arrays as key ingredient to manage light propagation and suppress diffractive broadening.

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