Observation of topological Anderson phase in laser-written quasi-periodic waveguide arrays

Weizhao Cheng, Weijie Liu, Quancheng Liu, Feng Chen

Research output: Contribution to journalArticlepeer-review

6 Scopus citations

Abstract

We report on the experimental observation of the topological Anderson phase in one-dimensional quasi-periodical waveguide arrays produced by femtosecond laser writing. The evanescently coupled waveguides are with alternating coupling constants, constructing photonic lattices analogous to the Su–Schrieffer–Heeger model. Dynamic tuning of the interdimer hopping amplitudes of the waveguide array generates the quasi-periodic disorder of the coupling constants for the model. As light propagates in the corresponding photonic waveguides, it exhibits different modes depending on the magnitude of the disorder. The topological Anderson phase is observed as the disorder is sufficiently strong, which corresponds to the zero-energy mode in its spectrum. The experimental results are consistent with the theoretical simulations, confirming the existence of the disorder-driven topological phase from a trivial band in the photonic lattice.

Original languageEnglish
Pages (from-to)2883-2886
Number of pages4
JournalOptics Letters
Volume47
Issue number11
DOIs
StatePublished - 1 Jun 2022

Bibliographical note

Publisher Copyright:
© 2022 Optica Publishing Group

Funding

Funding. Natural Science Foundation of Shandong Province (ZR2021 ZD02); National Natural Science Foundation of China (12174222); Taishan Scholar Project of Shandong Province (tspd20210303).

FundersFunder number
National Natural Science Foundation of China12174222
Natural Science Foundation of Shandong ProvinceZR2021 ZD02
Taishan Scholar Project of Shandong Provincetspd20210303

    Fingerprint

    Dive into the research topics of 'Observation of topological Anderson phase in laser-written quasi-periodic waveguide arrays'. Together they form a unique fingerprint.

    Cite this