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arXiv 2310.03386physics.opticsphysics.app-ph
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大规模自下而上制备的三维非线性光子晶体

Large-Scale Bottom-Up Fabricated 3D Nonlinear Photonic Crystals

Viola Valentina Vogler-Neuling, Ülle-Linda Talts, Rebecca Ferraro, Helena Weigand, Giovanni Finco, Joel Winiger, Peter Benedek, Justine Kusch, Artemios Karvouni… 展开作者

Viola Valentina Vogler-Neuling, Ülle-Linda Talts, Rebecca Ferraro, Helena Weigand, Giovanni Finco, Joel Winiger, Peter Benedek, Justine Kusch, Artemios Karvounis, Vanessa Wood, Jürg Leuthold, Rachel Grange

AI总结:

针对高效二阶非线性材料三维非线性光子晶体制备的技术局限,研究采用软纳米压印光刻在钛酸钡中实现自下而上制备的8层木堆结构3D NPhC,面积较现有水平大两个数量级,为该类材料制备提供新路径。

摘要:

非线性光学效应可用于产生激光难以达到的波长的相干光。在三个空间维度上非线性极化率呈周期极化或纳米结构的材料被称为三维非线性光子晶体(3D NPhCs),它们能够提升非线性光学转换效率、实现发射调控并同时产生多个非线性波长。高效二阶非线性材料($χ^{(2)}$)的化学惰性曾使其纳米制备在2018年之前无法实现,目前的方法受限于自上而下的激光技术,z轴方向的周期被限制在10微米。我们通过软纳米压印光刻技术,在溶胶-凝胶法制备的钛酸钡中实现了首个自下而上制备的三维NPhC:其为8层木堆结构,xy平面周期为1微米,z平面周期为300纳米,表面积超过$5.3\cdot 10^4$平方微米,比现有技术水平大两个数量级。本研究有望开启具有极强且通用非线性响应的三维NPhC的自下而上制备路径。

英文摘要:

Nonlinear optical effects are used to generate coherent light at wavelengths difficult to reach with lasers. Materials periodically poled or nanostructured in the nonlinear susceptibility in three spatial directions are called 3D nonlinear photonic crystals (NPhCs). They enable enhanced nonlinear optical conversion efficiencies, emission control, and simultaneous generation of nonlinear wavelengths. The chemical inertness of efficient second-order nonlinear materials ($χ^{(2)}$) prohibited their nanofabrication until 2018. The current method is restricted to top-down laser-based techniques limiting the periodicity along z-axis to 10 um. We demonstrate the first bottom-up fabricated 3D NPhC in sol-gel derived barium titanate by soft-nanoimprint lithography: a woodpile with eight layers and periodicities of 1 um (xy-plane) and 300 nm (z-plane). The surface areas exceed $5.3\cdot 10^4$ um^2, which is two orders of magnitude larger than the state-of-the-art. This study is expected to initiate bottom-up fabrication of 3D NPhCs with a supremely strong and versatile nonlinear response.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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