Nonlinear optics of two-dimensional heterostructures

doi:10.1007/s11467-023-1363-6

Front. Phys.

2024, Vol. 19

Issue (3) : 33301 https://doi.org/10.1007/s11467-023-1363-6

VIEW & PERSPECTIVE

Nonlinear optics of two-dimensional heterostructures

Xiangkun Zeng¹, Chenyu Wan¹, Zhichen Zhao¹, Di Huang¹(

), Zhanshan Wang^1,², Xinbin Cheng^1,², Tao Jiang¹(

)

¹. MOE Key Laboratory of Advanced Micro-Structured Materials, Shanghai Frontiers Science Center of Digital Optics, Institute of Precision Optical Engineering, and School of Physics Science and Engineering, Tongji University, Shanghai 200092, China
². Shanghai Institute of Intelligent Science and Technology, Tongji University, Shanghai 200092, China

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Abstract

Two-dimensional (2D) materials exhibit exceptionally strong nonlinear optical responses, benefiting from their reduced dimensionality, relaxed phase-matching requirements, and enhanced light-matter interaction. With additional degrees of freedom in the modulation of the physical properties by stacking 2D layers together, nonlinear optics of 2D heterostructures becomes increasingly fascinating. In this perspective, we provide a brief overview of recent advances in the field of nonlinear optics of 2D heterostructures, with a particular focus on their remarkable capabilities in characterization and modulation. Given the recent advances and the emergence of novel heterostructures, combined with innovative tuning knobs and advanced nonlinear optical techniques, we anticipate deeper insights into the underlying mechanisms and more associated applications in this rapidly evolving field.

Keywords nonlinear optics 2D heterostructures

Corresponding Author(s): Di Huang,Tao Jiang

Issue Date: 07 December 2023

Cite this article:

Xiangkun Zeng,Chenyu Wan,Zhichen Zhao, et al. Nonlinear optics of two-dimensional heterostructures[J]. Front. Phys. , 2024, 19(3): 33301.

URL:

https://academic.hep.com.cn/fop/EN/10.1007/s11467-023-1363-6
https://academic.hep.com.cn/fop/EN/Y2024/V19/I3/33301

Fig.1 Publications and citations about the nonlinear optical research on 2D heterostructures since 2013. Certain data included herein are derived from Clarivate Web of Science. Copyright ? Clarivate 2023.

Fig.2 Recent progresses in the field of nonlinear optics of 2D heterostructures. Owing to their sensitivity to structure, energy, and phase, nonlinear optical responses are demonstrated offering unique insights into the abundant degrees of freedom of 2D heterostructures, such as twist angles, grain boundaries, band structure, external field, phase transition, and beyond, as well as their underlying physics. Conversely, modulations of nonlinear optics become feasible by tweaking these degrees of freedom in 2D heterostructures.

Fig.3 Directions for future research on the nonlinear optics of 2D heterostructures. We anticipate the future endeavors will mainly focus on three aspects: (a, b) exploration of nonlinear optics in novel heterostructures, like moiré superlattice (a) and phase change heterostructure (b); (c, d) unveiling of deeper physical insights by advanced techniques such as 2DCS (c) and adiabatic plasmonic nano-focusing technique (d); (e) modulation of nonlinear optics via tuning the properties of 2D heterostructures by various tuning knobs.

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