Large nonlinear optical absorption and refraction of β-In2Se3 thin film from above to below bandgap excitation

被引：2
作者：
Wu, Dan [1 ,2 ,3 ]
Dong, Wen [1 ,2 ,3 ]
Ge, Yanqing [1 ,2 ,3 ]
Cao, Xueqin [1 ,2 ,3 ]
Shi, Mingjian [1 ,2 ,3 ]
Li, Erkang [1 ,2 ,3 ]
Ma, Nan [1 ,2 ,3 ]
Zhou, Yixuan [1 ,2 ,3 ]
Huang, Yuanyuan [1 ,2 ,3 ]
Lu, Chunhui [1 ,2 ,3 ]
Xu, Xinlong [1 ,2 ,3 ]
机构：
[1] Northwest Univ, State Key Lab Photoelect Technol & Funct Mat, Xian 710069, Peoples R China
[2] Northwest Univ, Lab Photon Technol Western China Energy, Xian 710069, Peoples R China
[3] Northwest Univ, Inst Photon & Photon Technol, Sch Phys, Xian 710069, Peoples R China
来源：
APPLIED PHYSICS EXPRESS | 2024年 / 17卷 / 05期
基金：
中国国家自然科学基金;
关键词：
saturable absorption; two-photon absorption; beta-In2Se3; two dimensional materials; self-defocusing; SATURABLE ABSORPTION; 2-PHOTON ABSORPTION; SATURATION; HETEROSTRUCTURE; GROWTH; LAYER;
D O I：
10.35848/1882-0786/ad4a1d
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Nonlinear optical materials, especially two-dimensional materials, are anticipated to reveal broadband optical nonlinearity for future miniaturized photonic applications. Herein, we report a physical vapor deposition method to produce beta-In2Se3 thin film and investigate the broadband nonlinear absorption (beta) and refraction (n(2)) characteristics. The beta-In2Se3 semiconductor shows an excellent optical nonlinearity with large beta in 10(2) cm GW(-1) scale and n(2) in 10(-12) cm(2) W-1 scale from visible to NIR wavelengths, which are superior to those of metal carbides and nitrides (MXenes) and metal-organic frameworks. This excellent optical nonlinearity makes beta-In2Se3 a promising candidate for advanced nanophotonic devices and beyond.
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页数：6
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