显微热极化印刷微结构SHG图案钠钙玻璃的研究

Microstructured SHG Patterns Imprinted on Soda Lime Glass Using Microthermal Poling

组成与结构呈特定分布的微结构可控印刷是实现小型化、集成化非线性光学器件的关键技术。本工作以镍网为阳极并以钠钙玻璃(SLG)为盖玻片,通过显微热极化工艺印刷出在微米尺度下具有空间和几何可控的二阶非线性光学性能的SLG。微结构的二次谐波生成(SHG)与显微热极化过程中SLG样品、镍网和SLG盖玻片之间所形成的阳极夹层的介质阻挡放电(DBD)密切相关。结果表明:DBD诱导了SLG样品和覆盖层中强度呈几何形状分布的内部电场;能量色散X射线光谱和Raman光谱证实微结构SHG图案的产生归因于SLG的Na+重新分布和结构重排引起的内部电场。该显微热极化技术适合于制备非线性光学元件。

Controllable printing of microstructure with specific composition and structure distribution is the key technology to miniaturize and integrate nonlinear optical devices.Spatial and geometry controls of second order nonlinear optical properties at the micrometer scale have been achieved in soda lime glass(SLG)using microthermal poling with nickel mesh as anodes and SLG as cover glass.Microstructured second harmonic generation(SHG)can be correlated to the dielectric barrier discharge(DBD)of a poling sandwich among an SLG sample,a nickel mesh,and a SLG cover.Experimental results show that the DBD induces an internal electric field with a geometrical intensity distribution in the SLG sample and cover.Furthermore,energy dispersive X-ray spectroscopy and Raman spectroscopy reveal that microstructured SHG patterns are attributed to the internal electric field induced by Na+redistribution and structural rearrangement of SLG.Microthermal poling can be used to fabricate nonlinear optical components.