Presentation Information
[10p-PA1-11]Structural investigation of femtosecond-laser-induced structural modifications
in molybdenum disulfide
〇Toshiya Kinnami1, Koharu Obinata1, Tomohiro Yoshikawa1, Junichi Kanasaki1, Isamu Yamamoto2, Junpei Azuma2, Kenzi Kisoda3, Eiichi Inami4 (1.Osaka Metropolitan Univ., 2.Saga Univ., 3.Wakayama Univ., 4.Kochi Univ.)
Keywords:
molybdenum disulfide,femtosecond-laser,Photoinduced structural modification
Femtosecond laser pulses were repeatedly irradiated onto molybdenum disulfide (MoS2), and the fluence-dependent surface morphology and compositional changes were evaluated by AFM, SEM, and EDS. In high-fluence regions, Mo-rich nanoparticle-like structures formed with sulfur desorption, whereas the layered structure with nearly stoichiometric composition was maintained in low-fluence regions. Together with spectroscopic results, the reaction process of photoinduced structural modification from the 2H phase to the 1T phase and metallic Mo formation is discussed.