Journal
ACS PHOTONICS
Volume 3, Issue 1, Pages 117-123Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsphotonics.5b00528
Keywords
laser beam shaping metamaterials; nonlinear optical materials; harmonic generation and mixing; photonic crystals
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Funding
- Israeli Science Foundation [1331/13]
- European Commission Marie Curie Career Integration Grant [333821]
- Tel-Aviv University Center for Renewable Energy President Scholarship
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We present here a method for generating second-harmonic beams with tailored beam profiles using nonlinear metasurfaces based on split ring resonators. By manipulating both the phase and the amplitude of the quadratic nonlinear coefficient locally, at the single inclusion level, the emitted second harmonic wavefront is perfectly controlled. These concepts are demonstrated experimentally by the far-field generation of second-harmonic Airy and vortex beams from nonlinear binary phase computer-generated holograms and the perfect near-field generation of a Hermite Gauss beam by precise amplitude and phase construction. We believe that these demonstrations open the door to use nonlinear metasurfaces for a variety of integrated nonlinear beam shaping devices.
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