Abstract
An algorithm for designing an aperture field that radiates caustic (Airy-beam type) beams along a predefined 3-D beam trajectory in free-space, with arbitrary curvature and torsion is presented. The predefined beam-axis trajectory sets the aperture field's phase to form a smooth caustic surface. The aperture amplitude distribution is constructed to manipulate both the on-axis intensity profile and the off-axis beam-width, via an iterative procedure. Once the aperture distribution is calculated, the radiation from a finite sampled aperture is computed numerically using a fast numerical technique. The algorithm is demonstrated for the case of helical trajectory beam.
| Original language | English |
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| Title of host publication | URSI General Assembly, Rome, Italy |
| Number of pages | 4 |
| State | Published - Sep 2020 |
| Event | URSI Gass 2020 - Rome, Italy Duration: 29 Aug 2020 → 5 Sep 2020 |
Conference
| Conference | URSI Gass 2020 |
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| Country/Territory | Italy |
| City | Rome |
| Period | 29/08/20 → 5/09/20 |