Formation of high-order acoustic Bessel beams by spiral diffraction gratings

The formation of high-order Bessel beams by a passive acoustic device consisting of an Archimedes' spiral diffraction grating is theoretically, numerically and experimentally reported in this work. These beams are propagation-invariant solutions of the Helmholtz equation and are characterized b...

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Veröffentlicht in:	arXiv.org 2016-04
Hauptverfasser:	Jiménez, Noé, Picó, Rubén, Sánchez-Morcillo, Víctor, Romero-García, Vicent, García-Raffi, Lluis M, Staliunas, Kestutis
Format:	Artikel
Sprache:	eng
Schlagworte:	Acoustics Beams (radiation) Dislocations Gratings (spectra) Helmholtz equations Physics - Classical Physics Scientific apparatus & instruments Sound waves Vortices Vorticity
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