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. 2013 Sep 1;38(17):3387-9.
doi: 10.1364/OL.38.003387.

Periodic self-accelerating beams by combined phase and amplitude modulation in the Fourier space

Yi Hu  1 , Domenico Bongiovanni, Zhigang Chen, Roberto Morandotti
Affiliations

Periodic self-accelerating beams by combined phase and amplitude modulation in the Fourier space

Yi Hu et al. Opt Lett. .

Abstract

We propose and demonstrate the generation of periodic self-accelerating beams through both phase and amplitude modulation in the Fourier space. For small amplitude variations, an accelerating beam still follows a smooth convex trajectory, which can be traced by acting on the spectral phase only. However, large modulations such as those generated from the Heaviside function with a zero amplitude distribution partially modify the convex trajectory due to the appearance of straight-line paths. Furthermore, periodic self-accelerating beams along convex trajectories are realized by employing an array of "spectral wells" in both the paraxial and nonparaxial regimes.

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