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Phys Rev Lett. 2012 Nov 16;109(20):203902. Epub 2012 Nov 15.

Fully vectorial accelerating diffraction-free Helmholtz beams.

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1
CREOL/College of Optics, University of Central Florida, Orlando, Florida 32816, USA.

Abstract

We show that new families of diffraction-free nonparaxial accelerating optical beams can be generated by considering the symmetries of the underlying vectorial Helmholtz equation. Both two-dimensional transverse electric and magnetic accelerating wave fronts are possible, capable of moving along elliptic trajectories. Experimental results corroborate these predictions when these waves are launched from either the major or minor axis of the ellipse. In addition, three-dimensional spherical nondiffracting field configurations are presented along with their evolution dynamics. Finally, fully vectorial self-similar accelerating optical wave solutions are obtained via oblate-prolate spheroidal wave functions. In all occasions, these effects are illustrated via pertinent examples.

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