2D BP/InSe Heterostructures as a Nonlinear Optical Material for Ultrafast Photonics

Abstract

The BP/InSe heterojunction has attracted the attention of many fields in successful combined high hole mobility of black phosphorus (BP) and high electron mobility of indium selenide (InSe), and enhanced the environmental stability of BP. Nevertheless, photonics research on the BP/InSe heterostructure was insufficient, while both components are considered promising in the field. In this work, a two-dimensional (2D) BP/InSe heterostructure was fabricated using the liquid-phase exfoliation method. Its linear and non-linear optical (NLO) absorption was characterized by ultraviolet−visible−infrared and Open-aperture Z-scan technology. On account of the revealed superior NLO properties, an SA based on 2D BP/InSe was prepared and embedded into an erbium-doped fiber laser, traditional soliton pulses were observed at 1.5 μm with the pulse duration of 881 fs. Furthermore, harmonic mode locking of bound solitons and dark-bright soliton pairs were also obtained in the same laser cavity due to the cross-coupling effect. The stable mode-locked operation can be maintained for several days, which overcome the low air stability of BP. This contribution further proves the excellent optical properties of 2D BP/InSe heterostructure and provides new probability of developing nano-photonics devices for the applications of double pulses laser source and long-distance information transmission.

Fabrication and Applications of Heterostructure Materials for Broadband Ultrafast Photonics

“…The BP/InSe heterostructure was obtained through centrifuging and stratifying the colloidal solution. [ 69 ] These new properties of heterostructure materials enrich the behavior patterns of solitons in lasers and the selection of SA materials. Although LPE has many advantages, it is undeniable that the material can only be handled on a macroscopic level without precise control.…”

“…Reproduced under the terms of CC‐BY 4.0 license. [ 69 ] Copyright 2022, The Authors, Published by MDPI.…”

Emerging Xene-Related Nanostructures for Versatile Applications

“…This Special Issue compiles twelve articles dedicated to Xene-related nanostructures for versatile applications: ten research articles and two review articles. The papers present a variety of Xene-related nanostructures including two-dimensional (2D) black phosphorus (BP) nanosheets (NSs) [ 16 , 17 ], zero-dimensional (0D) bismuth (Bi) quantum dots (QDs) [ 18 ], one-dimensional (1D) telluride (Te) nanotubes (NTs) [ 19 ], 2D MXene [ 20 , 21 , 22 ], 0D graphdiyne (GDY) QDs [ 23 ], 2D selenium (Se) NSs [ 24 ], and other related nanostructures (2D WSe 2 NSs [ 25 ], CH 3 NH 3 PbBr 3 perovskite [ 26 ], and SnO 2 nanoparticles [ 27 ]) are also featured. These advanced nanostructures have been widely applied to versatile applications, such as lithium (Li)-Te batteries [ 19 ], solar cells [ 20 ], electromagnetic interference (EMI) shielding [ 21 ], hydrophobic and photothermal surfaces [ 24 ], dental materials [ 18 ], optical devices [ 16 , 23 , 25 ], sensors [ 22 , 26 ], etc.…”

“…The as-obtained Se@MS exhibited a rapid wettability transition from hydrophilicity to hydrophobicity, and the highly stable photothermal conversion with a maximum temperature of 111 ± 3.2 °C due to the excellent photothermal effect of 2D Se NSs, which affords new design strategies for multifunctional porous structures for versatile applications, such as high-performance photothermal sterilization and solar desalination. Xene monoelemental nanostructure-based functional nanostructures were also rationally designed and successfully fabricated to further boost the performance, such as BP/InSe heterostructure [ 16 ]. The report by Shu et al [ 16 ] utilized high hole mobility of BP and high electron mobility of InSe, to fabricate BP/InSe heterostructure by a liquid-phase exfoliation method, which was embedded into an erbium-doped fiber laser.…”

“…Xene monoelemental nanostructure-based functional nanostructures were also rationally designed and successfully fabricated to further boost the performance, such as BP/InSe heterostructure [ 16 ]. The report by Shu et al [ 16 ] utilized high hole mobility of BP and high electron mobility of InSe, to fabricate BP/InSe heterostructure by a liquid-phase exfoliation method, which was embedded into an erbium-doped fiber laser. The harmonic mode-locking of bound solitons and dark-bright soliton pairs was obtained in the same laser cavity due to the cross-coupling effect, and the stable mode-locked operation could be well kept for several days, greatly improving the environmental stability of BP in air.…”