Shi Jia, Feng Shifeng, He Peng, Fu Yulan, Zhang Xinping
Institute of Information Photonics Technology, Faculty of Science, Beijing University of Technology, Beijing 100124, China.
Department of Chemistry, National University of Singapore, 3 Science Drive 3, Singapore 117543, Singapore.
Molecules. 2023 Sep 21;28(18):6737. doi: 10.3390/molecules28186737.
Two-dimensional (2D) materials with atomic thickness, tunable light-matter interaction, and significant nonlinear susceptibility are emerging as potential candidates for new-generation optoelectronic devices. In this review, we briefly cover the recent research development of typical nonlinear optic (NLO) processes including second harmonic generation (SHG), third harmonic generation (THG), as well as two-photon photoluminescence (2PPL) of 2D materials. Nonlinear light-matter interaction in atomically thin 2D materials is important for both fundamental research and future optoelectronic devices. The NLO performance of 2D materials can be greatly modulated with methods such as carrier injection tuning, strain tuning, artificially stacking, as well as plasmonic resonant enhancement. This review will discuss various nonlinear optical processes and corresponding tuning methods and propose its potential NLO application of 2D materials.
具有原子厚度、可调节的光与物质相互作用以及显著非线性极化率的二维（2D）材料正成为新一代光电器件的潜在候选材料。在本综述中，我们简要介绍了典型非线性光学（NLO）过程的最新研究进展，包括二维材料的二次谐波产生（SHG）、三次谐波产生（THG）以及双光子光致发光（2PPL）。原子级薄的二维材料中的非线性光与物质相互作用对于基础研究和未来光电器件都很重要。二维材料的NLO性能可以通过载流子注入调谐、应变调谐、人工堆叠以及等离子体共振增强等方法进行大幅调制。本综述将讨论各种非线性光学过程及相应的调谐方法，并提出二维材料潜在的NLO应用。
