集成二维材料非线性光学特性研究进展  

Research progress of nonlinear optical properties of integrated two-dimensional materials

作　　者：刘宁[1,2,3] 刘肯[1,2,3] 朱志宏[1,2,3] Liu Ning;Liu Ken;Zhu Zhi-Hong(College of Advanced Interdisciplinary Studies,National University of Defense Technology,Changsha 410073,China;Hunan Provincial Key Laboratory of Novel Nano-Optoelectronic Information Materials and Devices,National University of Defense Technology,Changsha 410073,China;Nanhu Laser Laboratory,National University of Defense Technology,Changsha 410073,China)

机构地区：[1]国防科技大学前沿交叉学科学院,长沙410073 [2]国防科技大学,新型纳米光电信息材料与器件湖南省重点实验室,长沙410073 [3]国防科技大学,南湖之光实验室,长沙410073

出　　处：《物理学报》2023年第17期104-120,共17页Acta Physica Sinica

摘　　要：全光信号处理中具有优异非线性光学特性的光子平台对于提升器件的集成度、调制速度以及工作带宽等性能参数至关重要.成熟的硅、氧化硅以及氮化硅光子平台由于材料本身中心对称,基于这些平台的集成光子器件可实现的非线性光学功能受限;二维材料尽管有着优异的非线性光学特性,但只有原子层厚,其非线性潜能无法被充分利用.将二维材料与成熟的光子平台集成,在充分利用光子平台成熟加工工艺的基础上,可以显著提高光与二维材料的相互作用,提升光子平台的非线性光学性能.基于以上背景,本文总结了近年来在基于转移方法和直接生长法制备的多种异质集成二维材料光子器件中进行非线性光学特性研究的最新进展;阐述了相较于传统转移方法,基于直接生长方法进行集成二维材料非线性光学研究的优势以及未来需要解决的技术难点;指明了该领域未来的研究发展趋势;并指出直接在各种成熟的光子平台上生长二维材料进行集成非线性光学特性的研究会对未来光通信、信号处理、光传感以及量子技术等领域的发展产生深远影响.Photonic platforms with excellent nonlinear optical characteristics are very important to improve the devices'performance parameters such as integration,modulation speeds and working bandwidths for all-optical signal processing.The traditional processing technology of photonic platforms based on silicon,silicon nitride and silicon oxide is mature,but the nonlinear function of these optical platforms is limited due to the characteristics of materials;Although two-dimensional(2D)materials possess excellent nonlinear optical properties,their nonlinear potentials cannot be fully utilized because of their atomic layer thickness.Integrating 2D materials with mature photonic platforms can significantly improve the interaction between light and matter,give full play to the potentials of 2D materials in the field of nonlinear optics,and improve the nonlinear optical performances of the integrated platforms on the basis of fully utilizing the mature processing technology of the photonic platforms.Based on the above ideas,starting from the basic principle of nonlinear optics(Section 2),this review combs the research progress of various nonlinear photonic platforms(resonators,metasurfaces,optical fibers,on-chip waveguides,etc.)heterogeneously integrated with 2D materials,realized by traditional transfer methods(Section 3)and emerging direct-growth methods(Section 4)in recent years,and the introduction is divided into second-order and third-order nonlinearity.Comparing with the transfer methods,the advantages of using direct-growth methods to realize the heterogeneous integration of 2D materials and photonic platforms for the study of nonlinear optics are expounded,and the technical difficulties to be overcome in preparing the actual devices are also pointed.In the future,we can try to grow 2D materials directly onto the surfaces of various cavities to study the enhancement of second-order nonlinearity;we can also try to grow 2D materials directly onto the on-chip waveguides or microrings to study the enhancement of third-ord

关 键 词：硅/氮化硅光子平台 二维材料 光子集成 非线性增强 材料生长 

分 类 号：O437[机械工程—光学工程] TB34[理学—光学]