4.8 Letter

On-axis shaping of second-harmonic beams

期刊

LASER & PHOTONICS REVIEWS
卷 9, 期 6, 页码 L40-L44

出版社

WILEY-V C H VERLAG GMBH
DOI: 10.1002/lpor.201500154

关键词

second-harmonic generation; holography; photonic crystals

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We report complete spatial shaping (both phase and amplitude) of the second-harmonic beam generated in a nonlinear photonic crystal. Using a collinear second-order process in a nonlinear computer generated hologram imprinted on the crystal, the desired beam is generated on-axis and in the near field. This enables compact and efficient one-dimensional beam shaping in comparison to previously demonstrated off-axis Fourier holograms. We experimentally demonstrate the second-harmonic generation of high-order Hermite-Gauss, top hats and arbitrary skyline-shaped beams.

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