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Journal Article

Nonparaxial accelerating Bessel-like beams


Chremmos,  Ioannis D.
Sandoghdar Division, Max Planck Institute for the Science of Light, Max Planck Society;

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Chremmos, I. D., & Efremidis, N. K. (2013). Nonparaxial accelerating Bessel-like beams. PHYSICAL REVIEW A, 88(6): 063816. doi:10.1103/PhysRevA.88.063816.

Cite as: https://hdl.handle.net/11858/00-001M-0000-002D-66D1-C
A class of nonparaxial accelerating optical waves is introduced. These are beams with a Bessel-like profile that are capable of shifting laterally along fairly arbitrary trajectories as the wave propagates in free space. The concept expands on our previous proposal of paraxial accelerating Bessel-like beams to include beams with subwavelength lobes and/or large trajectory angles. Such waves are produced when the phase at the input plane is engineered so that the interfering ray cones are made to focus along the prespecified path. When the angle of these cones is fixed, the beams possess a diffraction-free Bessel profile on planes that stay normal to their trajectory, which can be considered as a generalized definition of diffractionless propagation in the nonparaxial regime. The analytical procedure leading to these results is based on a ray-optics interpretation of Rayleigh-Sommerfeld diffraction and is presented in detail. The evolution of the proposed waves is demonstrated through a series of numerical examples and a variety of trajectories.