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We show theoretically and experimentally that photonic lattices constructed from random components residing on a ring in momentum space are amorphous, yet they exhibit a bandgap, and support linear and nonlinear defect-state guidance.
We generate Wannier-Stark beams and observe shape-invariant propagation and acceleration in photonic lattices. In the absence of a lattice, such Wannier-Stark states diffract and deteriorate asymmetrically, in agreement with theoretical predictions.
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