Linear and nonlinear optical properties modulation of Sb2Te3/GeTe bilayer film as a promising saturable absorber

被引：34
|
作者：
Cheng, Ling [1 ]
Yuan, Yafei [1 ,2 ]
Liu, Chunmin [1 ]
Cao, Xinran [1 ]
Su, Jing [1 ]
Zhang, Xintong [1 ]
Zhang, Hao [1 ,3 ]
Zhao, Haibin [1 ,3 ]
Xu, Min [1 ,3 ]
Li, Jing [1 ,3 ]
机构：
[1] Fudan Univ, Dept Opt Sci & Engn, Shanghai Engn Res Ctr Ultraprecis Opt Mfg, Shanghai 200433, Peoples R China
[2] Fudan Univ, Dept Elect Engn, Shanghai 200433, Peoples R China
[3] Fudan Univ, Minist Educ, Key Lab Micro & Nano Photon Struct, Shanghai 200433, Peoples R China
来源：
RESULTS IN PHYSICS | 2019年 / 13卷
基金：
中国国家自然科学基金; 上海市自然科学基金;
关键词：
Sb2Te3/GeTe bilayer; Optical properties; Saturable absorber; Modulation depth; Interface state; FIBER LASER; ABSORPTION;
D O I：
10.1016/j.rinp.2019.102282
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Sb2Te3/GeTe bilayer films with different thickness ratios have been deposited on silicon substrate and fused quartz substrates by radio-frequency magnetron sputtering. Linear optical properties and optical bandgap of sample films were investigated firstly. With the thickness ratio changes, their transmittance differences decrease a lot at the wavelength range of 1500-1600 nm. Besides, the modulation depth of saturable absorption of samples will increase along to the incident power density or thickness ratio. Besides incident power density, interface states between topological insulation characteristic Sb2Te3 and ferroelectric GeTe layers will also affect the modulation depth greatly.
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收藏
页数：7
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