Integrated photonics are expected to replace the conventional free‐space optical systems, yet there remains a challenge of low nonlinear response due to small nonlinear refractive index and short interaction length. Here, the large‐area monolayer MoS₂ is used to facilitate excellent nonlinear response, and a pump strategy is proposed with respect to the spontaneous four‐wave mixing in the visible spectral range. The external pump incident from the top resonates in the GaN microdisk resonator and is thoroughly absorbed by the monolayer MoS₂ to generate the four‐wave mixing pump via the excitonic photoluminescence. Being driven by the internal photoluminescence pump and enhanced by the microcavity structure, it is validated that the proposed structure well suffices efficient degenerate spontaneous four‐wave mixing generation. Since the emission spectrum can be tailored through careful temperature control, this work holds a great potential in various functionalities, not only on‐chip visible light sources but also optical field control.

中文翻译：

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单层MoS2包覆的GaN微盘谐振器中的光致发光四波混频产生

集成光子技术有望取代传统的自由空间光学系统，但由于非线性折射率小和相互作用长度短，仍然存在低非线性响应的挑战。在这里，大面积单层MoS ₂用于促进出色的非线性响应，并且针对可见光谱范围内的自发四波混合提出了一种泵浦策略。从顶部入射的外部泵在GaN微盘谐振器中产生谐振，并被单层MoS ₂完全吸收通过激子光致发光产生四波混频泵。由内部光致发光泵驱动并由微腔结构增强，可以验证所提出的结构足以满足高效的简并自发四波混合生成。由于可以通过仔细的温度控制来调整发射光谱，因此这项工作在各种功能上都具有巨大的潜力，不仅包括片上可见光源，还包括光场控制。