Abstract

We theoretically demonstrate the formation and control of novel snake filaments in air. In particular, the snake filaments can be elongated with large input beam size in the phase modulation direction, and they share almost the same zigzagging fashion during propagation. The specific fields of satellite lobes make great contributions on alternating the accelerating direction of the main lobe, namely, the snake filament. As a result, the filament accelerates in a certain transverse area within two-phase boundaries that are called phase wells. Furthermore, for the spatiotemporal dynamics, a strip structure is sustained during the filamentation process of snake filaments. Results presented here are expected to have a significant impact on a wide range of fields in nonlinear optics.

© 2017 Optical Society of America

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