Abstract Monolayer transition-metal dichalcogenides (TMDCs) with intrinsically broken crystal inversion symmetry have shown large second-order nonlinear responses, providing a new platform for nonlinear light-matter interaction engineering. Integrating two dimensional monolayers with nanoresonators has been demonstrated to enhance the second harmonic generation. Previous designs suffer from the drawbacks of low cavity quality factor and/or small interaction area. In this letter, we demonstrate the enhancement of second harmonic generation by coupling a TMDC monolayer to the guided-mode resonances of a one-dimensional photonic crystal, showing a 170-fold enhancement of the generated signal relative to a bare monolayer. The work shows a way towards silicon chip-integrated nonlinear devices based on two dimensional materials.

中文翻译：

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一维光子晶体大大增强了二硫化钼中二次谐波的产生

摘要 具有内在破坏晶体反转对称性的单层过渡金属二硫属化物（TMDCs）表现出较大的二阶非线性响应，为非线性光物质相互作用工程提供了新的平台。已证明将二维单层与纳米谐振器集成可以增强二次谐波的产生。以前的设计具有腔品质因数低和/或相互作用面积小的缺点。在这封信中，我们通过将 TMDC 单层耦合到一维光子晶体的导模共振来证明二次谐波生成的增强，显示生成的信号相对于裸单层增强了 170 倍。这项工作展示了一种基于二维材料的硅芯片集成非线性器件的方法。