First Principles Study and Experimental Investigation of Graphene-Molybdenum Disulphide Nanocomposites Based Passive Saturable Absorber
نویسندگان
چکیده
Research on hybrid graphene with other two-dimensional materials has gained considerable attention owing to their potential applications beyond single components. Through our first principles analysis via density functional theory, graphene-molybdenum disulphide (MoS2) demonstrated a band gap opening by 2 meV, from gapless when MoS2 layer is introduced into the structure. The simulated graphene-MoS2 direct situated at K point of Brillouin zone preserved Dirac properties graphene. experimental studies also have been performed preparing graphene-MoS2-chitin nanocomposite through facile liquid-phase exfoliation method. Apart energy using Tauc relation, physical morphology and nonlinear material were systematically characterized. Graphene-MoS2-chitin exhibits modulation depth 10.5%, which lower than individual but higher MoS2. Further investigation material’s performance was done integrating fabricated film Erbium-doped fiber laser. Stable nanosecond pulse laser operation realized saturable absorber. width measured be 156.4 ns repetition rate 1.89 MHz, corresponding peak power 56.13 mW 8.78 nJ.
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ژورنال
عنوان ژورنال: Photonics
سال: 2022
ISSN: ['2304-6732']
DOI: https://doi.org/10.3390/photonics9100704