Abstract

Transport inhibition via Anderson localization is ubiquitous in disordered periodic lattices. However, in crystals displaying only flatbands, disorder can lift macroscopic band flattening, removing geometric localization and enabling transport in certain conditions. Such a striking phenomenon, dubbed inverse Anderson transition and predicted for three-dimensional flatband systems, has thus far not been directly observed. Here we suggest a simple quasi one-dimensional photonic flatband system, namely, an Aharonov–Bohm photonic cage, in which correlated binary disorder induces an inverse Anderson transition and ballistic transport.

© 2021 Optical Society of America

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Supplementary Material (1)

NameDescription
Supplement 1       The supplemental document contains a technical analysis on the robustness of compact localized states for correlated symmetric disorder and numerical simulations of light spreading in realistic waveguide lattices.

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Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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