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  • Letter

Observation of edge-to-edge topological transport in a photonic lattice

Weijie Liu1,*, Chaohua Wu2,3,*, Yuechen Jia1, Suotang Jia2,3, Gang Chen2,3,4,†, and Feng Chen1,‡

  • 1School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
  • 2State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Shanxi University, Taiyuan 030006, China
  • 3Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China
  • 4Collaborative Innovation Center of Light Manipulations and Applications, Shandong Normal University, Jinan 250358, China

  • *These authors contributed equally to this work
  • †chengang971@163.com
  • ‡drfchen@sdu.edu.cn
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Phys. Rev. A 105, L061502 – Published 16 June, 2022

DOI: https://doi.org/10.1103/PhysRevA.105.L061502

Abstract

The edge-to-edge topological transport of the one-dimensional odd-sized Su-Schrieffer-Heeger model plays a crucial role in robust energy transfer and information processing. However, it has not been verified experimentally. Here we report on an experimental demonstration of this topological transport in a one-dimensional photonic lattice of coupled waveguides. When slowly varying the spacings of the adjacent waveguides, the robust topological transport of light from the leftmost to the rightmost channels has been successfully observed. Moreover, the transport speed and efficiency of light are enhanced considerably by introducing the exponential-type modulations of the coupling strengths. The experimental results agree well with analytical calculations and numerical simulations. This transport of light observed may serve as the basis for photonic devices of unconventional functions.

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Phys. Rev. A 105, L061502– Published 16 June, 2022
  • Received 9 January 2022
  • Accepted 2 June 2022
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