Excitonic Effects on the Ultrafast Nonlinear Optical Response of MoS₂ and Fluorinated Graphene/MoS₂ Heterostructure Films for Photonic Applications.

ABSTRACT: In the present work, the ultrafast nonlinear optical (NLO) response of some molybdenum disulfide (MoS₂), fluorinated graphene (FG), and FG/MoS₂ heterostructure thin films was studied using the Z-scan and optical Kerr effect techniques employing femtosecond laser pulses at different excitation wavelengths (i.e., 400, 570, 610, 660, 800, and 1200 nm). The experiments have shown that the NLO response of the MoS₂ and MoS₂/FG films was significantly enhanced when the films were excited with 400, 610, and 660 nm laser pulses due to resonance effects with the close-lying excitons in these nanostructures. For a better evaluation of the resonant enhancement of the NLO response, measurements were also carried out at off-resonant wavelengths, i.e., a

SUBMITTER: Arapakis V 

PROVIDER: S-EPMC11583122 | biostudies-literature | 2024 Nov

REPOSITORIES: biostudies-literature