Few-layer bismuthene for 1-μm ultrafast laser applications

Abstract

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.

2D Bismuthene as a Functional Interlayer between BiVO4 and NiFeOOH for Enhanced Oxygen‐Evolution Photoanodes

“…Raman bands at 88.5 and 122.0 cm -1 are assigned to E g (in-plane mode) and A 1g (out-of-plane mode) vibration modes of Bi atoms, respectively. [26][27][28][29] Compared with the Raman bands of pure bismuth metal, typically narrow bands at 70.0 and 97.0 cm -1 , [30] a shift to higher wavenumbers and a pronounced broadening indicate the decrease of long-range ordering herein assigned to the 2D shape. [31] The blue shift of the A 1g vibration mode is larger than that of the E g one, and the E g vibration mode shows a relatively smaller intensity.…”

Generation of mode-locked thulium/holmium-doped fiber laser assisted by bismuthene/side polished fiber as saturable absorber

“…Based on the two sets of fabricated SA devices, they have modulation depth below 10%, which is sufficient for the generation of mode-locked pulsed lasers [25,27,40,41].…”

“…Feng et al [40] and Chai et al [41] have recently experimented with Ytterbium-doped fiber. They deposited the bismuthene as SA on microfiber to generate a mode-locked pulse at 1035.84 and 1034.4 nm, respectively.…”