TY - JOUR A1 - Feng, Tianci A1 - Li, Xiaohui A1 - Chai, Tong A1 - Guo, Penglai A1 - Zhang, Ying A1 - Liu, Ruisheng A1 - Liu, Jishu A1 - Lu, JiangBo A1 - Ge, Yanqi T1 - Few-layer bismuthene for 1-μm ultrafast laser applications JF - Beilstein Archives Y1 - 2019/// SN - M3 - doi:10.3762/bxiv.2019.28.v1 N2 - Bismuthene, as a new two-dimensional (2D) material made up of diazo metal elements, has drawn massive attention for its unique electronic, mechanical, and quantum properties. However, the nonlinear optical properties of bismuthene in 1-µm region, especially their applications for ultrafast photonics and internal ultrashort pulse dynamics, has seldom been explored yet. In this work, we investigate the few-layer bismuthene characterizations and apply it as a saturable absorber (SA) in a 1-μm ultrafast pulse generation. Thanks to the narrow bandgap of bismuthene and tapered fiber structure, A special noise like pulse has been obtained. The dynamics is also quite different from previous observed pulses, whose intensity ratio of coherent peak and envelope components is of around 5:4 from the autocorrelation trace. It’s demonstrated that the abnormal noise-like pulses contain more uniform-intensity sub pulses. This proposed pulsed fiber laser based on bismuthene SA source is well suitable for some applications such as material processing, optical logics etc. ER -