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.

引用

页数：6

共 29 条

[21] Saturable Absorption in 2D Nanomaterials and Related Photonic Devices [J].