Journal
PHYSICAL REVIEW A
Volume 105, Issue 6, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevA.105.L061502
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Funding
- National Key R&D Program of China [2021YFA1400900]
- National Natural Science Foundation of China [12034012, 12074232, 12125406]
- Natural Science Foundation of Shandong Province [ZR2021ZD02]
- Taishan Scholar Program [tspd20210303]
- Shanxi 1331 Project
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This study experimentally demonstrates the edge-to-edge topological transport in a one-dimensional photonic lattice of coupled waveguides, which enables robust energy transfer and information processing. The transport speed and efficiency of light are significantly enhanced by modulating the coupling strengths. This finding is of great importance for the development of photonic devices with unconventional functions.
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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