We show that only in a unique class of z-dependent lattices a true accelerating and diffractionless beam (different from Airy) can exist. Such beams are also possible under nonlinear conditions as exact traveling lattice solitons.
© 2012 OSA
K. Makris, R. El-Ganainy, X. Qi, Z. Chen, and D. N. Christodoulides, "Accelerating and diffractionless beams in optical lattices," in Conference on Lasers and Electro-Optics 2012, OSA Technical Digest (online) (Optical Society of America, 2012), paper JTu3K.6.
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