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Experimental Realization of Multiple Topological Edge States in a 1D Photonic Lattice
Author(s) -
Zhang Zhifeng,
Teimourpour Mohammad Hosain,
Arkinstall Jake,
Pan Mingsen,
Miao Pei,
Schomerus Henning,
ElGanainy Ramy,
Feng Liang
Publication year - 2019
Publication title -
laser and photonics reviews
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.778
H-Index - 116
eISSN - 1863-8899
pISSN - 1863-8880
DOI - 10.1002/lpor.201800202
Subject(s) - photonics , realization (probability) , topology (electrical circuits) , lattice (music) , femtosecond , physics , photonic crystal , silicon photonics , ultrashort pulse , optoelectronics , quantum mechanics , mathematics , laser , statistics , combinatorics , acoustics
Topological photonic systems offer light transport that is robust against defects and disorder, promising a new generation of chip‐scale photonic devices and facilitating energy‐efficient on‐chip information routing and processing. However, present quasi one dimensional (1D) designs, such as the Su–Schrieffer–Heeger and Rice–Mele models, support only a limited number of nontrivial phases due to restrictions on dispersion band engineering. Here, a flexible topological photonic lattice on a silicon photonic platform is experimentally demonstrated that realizes multiple topologically nontrivial dispersion bands. By suitably setting the couplings between the 1D waveguides, different lattices can exhibit the transition between multiple different topological phases and allow the independent realization of the corresponding edge states. Heterodyne measurements clearly reveal the ultrafast transport dynamics of the edge states in different phases at a femtosecond scale, validating the designed topological features. The study equips topological models with enriched edge dynamics and considerably expands the scope to engineer unique topological features into photonic, acoustic, and atomic systems.

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