Few-layer bismuthene for ultrashort pulse generation in a dissipative system based on an evanescent field

Abstract

Bismuthene has attracted a great deal of attention because of its unique electronic and optical properties. However, there are few reported applications of bismuthene in nonlinear optical applications. In this research, a dissipative soliton ytterbium-doped mode-locked fiber laser at 1 μm regime with a bismuthene saturable absorber (SA) by using evanescent field interaction for the first time is demonstrated. The nonlinear optical absorption of microfiber-based bismuthene SA is shown experimentally by using a homemade ultrafast fiber laser, whose saturation intensity and modulation depth are about 13 MW cm-2 and 2.2%, respectively. Relying on the excellent nonlinear optical property of the bismuthene SA, the typical dissipative solitons with a repetition rate of 21.74 MHz are generated at a center wavelength of 1034.4 nm. The time-bandwidth product of the pulse is about 23.07 with a pulse width of 30.25 ps. The results demonstrate that bismuthene is a good candidate for application in a 1 μm wave-breaking-free mode-locked fiber laser and nonlinear photonic components.

Bismuthene for highly efficient carbon dioxide electroreduction reaction

“…For example, metal Bi, Bi single atomic 13 , Bi spherical nanoparticles 14,15 , Bi nanobelts 16 , thin films 17 , Bi nanowires 18 , and Bi 2 O 3 nanotubes 11 have been synthesized, but all with very limited CO2RR catalytic performance to HCOO − production. Two-dimensional (2D) multilayered Bi nanosheets with limited CO2RR performance [19][20][21] have also been synthesized recently with state-of-the-art synthesis methodologies, including, but not limited to, sonochemical exfoliation of bulk Bi 22 and in situ topotactic electroreduction of Bi precursors 23 . The monolayer Bi nanosheet (Bismuthene) was experimentally realized recently over templates such as SiC 20 and NbSe 2 24 , while the unsupported, stable, free-standing Bismuthene has never been synthesized before, but predicted and studied theoretically in the context of investigating its thermoelectric and other electronic properties [25][26][27][28] .…”

2D V‐V Binary Materials: Status and Challenges

“…Black phosphorene possesses high carrier mobility, as well as thickness‐dependent bandgap covering the visible to MIR spectral range. In addition, its optical properties have been widely studied and the photodetectors show remarkably high performances, indicating that phosphorene is a promising candidate for photodetection …”

Recent progress on optical rogue waves in fiber lasers: status, challenges, and perspectives

“…In the last decade, 2-D nanomaterials, including grapheme, 73,[163][164][165] topological insulators, 53 and transition metal dichalcogenides, [166][167][168] have been widely applied as optical saturable absorbers for MLFLs and have been studied for RW generation. 53 In the last three years, there have been many 2-D materials reported for application in ultrafast fiber lasers, [169][170][171][172] which has significantly enhanced the development of the ultrafast lasers. Continually searching and employing new materials with good saturable absorptions and highly nonlinear characteristics may sufficiently quicken the above-mentioned process.…”