SnS₂ Microsheets for Optical Supramolecular Generation

Abstract

Multi-pulse soliton molecules are observed in passively mode-locked fiber lasers by using 2D layered metal dichalcogenides (LMDs) as a saturable absorber. LMD has attracted significant attention in photonics and optoelectronics in which tin disulfides (SnS 2 ) are implemented for energy storage, photo-catalysts, and transistor. However, the applications of SnS 2 in optoelectronics fields are quite rare. Soliton supramolecules are the self-assembly of optical solitons into highly-ordered supramolecular structures which have not been experimentally observed due to the absence of techniques for controlling the inter-soliton forces. In this article, SnS 2 LMDs are successfully applied in a passively mode-locked fiber laser. It is confirmed that the proposed fiber laser has a center wavelength of 1561.5 nm, a 3-dB spectral width of 2.45 nm, signal-to-noise ratio of 63 dB, and a radiofrequency of 7.2 MHz. The different interiors of the second-order, third-order, and ninth-order bound state of solitons in the cavity are investigated. Furthermore, it is found that numbers of optical solitons self-assembled into highly ordered supramolecular structures in a passively mode-locked fiber laser for the first time. The bound state between the six supramolecular soliton units is obtained experimentally and theoretically which have potential applications in ultrafast laser-field manipulation and optical information storage because of special interactions between pulses.

Pure-high-even-order dispersion bound solitons complexes in ultra-fast fiber lasers

“…Its autocorrelation trace comprises two PHEOD bound state units: one unit is a PHEOD bound tri-soliton, and the other unit is a PHEOD bound soliton pair. The intensity ratio of different peaks is close to 1:1:1:1:1:3.87:1:1:1:1:1, suggesting that the unusual structural PHEOD bound multi-soliton may be unstable, with variable pulse intensity and separation 56 . Such unusual structural PHEOD bound multi-solitons further substantiate the possibility of changing the number of PHEOD solitons through high-order dispersion management without adjusting the pump power.…”

Pure-high-even-order dispersion bound solitons complexes in ultra-fast fiber lasers

“…The intensity ratio of different peaks is close to 1:1:1:1:1:3.87:1:1:1:1:1, suggesting that the unusual structural PHEOD bound multi-soliton may be unstable, with variable pulse intensity and separation 44 . Such unusual structural PHEOD bound multi-solitons further substantiate the possibility of changing the number of PHEOD solitons through highorder dispersion management without adjusting the pump power.…”