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

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-...

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Bibliographic Details
Published in:International journal of molecular sciences 2023-04, Vol.24 (7), p.6540
Main Authors: Venkatesh, Mottamchetty, Kim, Vyacheslav V., Boltaev, Ganjaboy S., Konda, Srinivasa Rao, Svedlindh, Peter, Li, Wei, Ganeev, Rashid A.
Format: Article
Language:English
Subjects:
Carbon
Chalcogenides
Dopants
Emission analysis
Emissions
Harmonic generators
high-order harmonics generation
Higher harmonics
Lasers
molecular plasma
Molecular structure
Molybdenum
Nanoparticles
Nonlinear optics
Optical properties
optimization of plasma formation
Plasma
resonance enhancement of harmonic
Semiconductors
Spectrum analysis
Transition metal compounds
Ultraviolet emission
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Summary: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.
ISSN:1422-0067
1661-6596
1422-0067
DOI:10.3390/ijms24076540