High-Order Harmonics Generation in MoS2 Transition Metal Dichalcogenides: Effect of Nickel and Carbon Nanotube Dopants

Abstract

The transition metal dichalcogenides have instigated a lot of interest as harmonic generators due to their exceptional nonlinear optical properties. Here, the molybdenum disulfide (MoS2) molecular structures with dopants being in a plasma state are used to demonstrate the generation of intense high-order harmonics. The MoS2 nanoflakes and nickel-doped MoS2 nanoflakes produced stronger harmonics with higher cut-offs compared with Mo bulk and MoS2 bulk. Conversely, the MoS2 with nickel nanoparticles and carbon nanotubes (MoS2-NiCNT) produced weaker coherent XUV emissions than other materials, which is attributed to the influence of phase mismatch. The influence of heating and driving pulse intensities on the harmonic yield and cut-off energies are investigated in MoS2 molecular structures. The enhanced coherent extreme ultraviolet emission at ~32 nm (38 eV) due to the 4p-4d resonant transitions is obtained from all aforementioned molecular structures, except for MoS2-NiCNT.

High-Order Harmonics Generation in Selenium-Containing Plasmas

“…The physical mechanisms showing a distinction of the RH effect in atoms and molecules were discussed in [35]. In [36], this difference was analyzed in the case of atomic (Mo) and molecular (MoS 2 ) molybdenum-containing plasmas. The resonant harmonic generation from Mo-containing materials is due to the influence of 4p-4d resonant transitions from the single and double-ionized Mo [37].…”

Machine learning accelerated the prediction of mechanical properties of copper modified by TMDs based on molecular dynamics simulation

“…Two-dimensional nanomaterials such as Transition Metal Dichalcogenides (TMDs) have garnered significant attention due to their unique electronic structure, outstanding mechanical properties, and multifunctionality. They contribute significantly to the enhancement of the mechanical performance of metallic materials [4][5][6][7][8][9][10]. However, currently, performance testing for these materials is primarily reliant on experimental measurements, which can be time-consuming and labor-intensive.…”