Wavelength-dependent nonlinear wavefront shaping in 3D nonlinear photonic crystal

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外文摘要：A 3D nonlinear photonic crystal containing four parallel segments of periodic x[2]grating structure is fabricated employing the femtosecond laser poling of ferroelectric Ca0.28Bao.72Nb2O6 crystal.The second harmonic generation from this four-segment structure is studied with a fundamental Gaussian wave.By tuning the wavelength of the fundamental wave,the second harmonic varies from the Laguerre-Gaussian beam[topological charge lc=1]to the higher-order Hermite-Gaussian beam and Laguerre-Gaussian again[lc=-1].This effect is caused by the wavelength-dependent phase delays introduced by the four-grating structure.Our study contributes to a deeper understanding of nonlinear wave interactions in 3D nonlinear photonic crystals.It also offers new possibilities for special beam generation at new frequencies and their control.

外文关键词：

quasi-phase matchingnonlinear photonic crystalsecond harmonic generationnonlinear beam shaping

作者：

王韵泽、盛艳、刘山、赵如薇、徐天翔、徐铁峰、陈峰、Wieslaw Krolikowski

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作者单位：

Laboratory of Infrared Materials and Devices,Research Institute of Advanced Technologies,Ningbo University,Ningbo 315211,China

Engineering Research Center for Advanced Infrared Photoelectric Materials and Devices of Zhejiang Province,Ningbo University,Ningbo 315211,China

Quantum Science and Technology,Research School of Physics,Australian National University,Canberra,ACT 2601,Australia

Ningbo Institute of Oceanography,Ningbo 315832,China

State Key Laboratory of Crystal Materials and Key Laboratory of Particle Physics and Particle Irradiation of the Ministry of Education,School of Physics,Shandong University,Jinan 250100,China

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出版年：

2024

DOI：

10.3788/COL202422.071901

中国光学快报(英文版)

中国光学学会中国科学院上海光学精密机械研究所

中国光学快报(英文版)

CSTPCD

影响因子：1.305

ISSN：1671-7694

年,卷(期)：2024.22(7)