The enhancement of the nonlinear optical properties of hybrid nanoparticle films by coupling between metallic and plasmonic semiconducting nanoparticles is shown. A heterostructure comprising CuS and Au nanoparticle films separated by a thin layer of insulating ligands enhanced the yield of second-harmonic light by a factor of 3.3 compared with the sum of the constituent nanoparticles on their own. Heterostructures were fabricated with scalable solution-processing techniques that can create devices of arbitrary geometry. In addition to harmonic generation, the multiple-photon photoluminescence response of Au, CuS, and heterostructured films is also explored.

中文翻译：

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耦合半导体和金属纳米粒子薄膜的增强宽带和谐波上转换

显示了通过金属和等离子体半导体纳米粒子之间的耦合增强了混合纳米粒子薄膜的非线性光学性能。包含CuS和Au纳米颗粒薄膜的异质结构被绝缘配体薄层隔开，与构成纳米颗粒本身的总和相比，二次谐波光的产量提高了3.3倍。异质结构是使用可扩展的解决方案处理技术制造的，该技术可以创建任意几何形状的设备。除了产生谐波之外，还探索了Au，CuS和异质结构膜的多光子光致发光响应。