講演情報
[11a-E219-2]Wavelength Dependence of Saturable Absorption in MAX Phase Mo2Ga2C Using a Tunable Raman Soliton Excitation Source
〇(D)WeiLing Ooi1,2, Shotaro Kitajima1, Azura Hamzah2, Ahmad Haziq Aiman Rosol3,2, Sulaiman Hadi Warun3, Norihiko Nishizawa1 (1.Nagoya Univ., 2.UTM, 3.UM)
キーワード：
MAX phase saturable absorber、open-aperture Z-scan、wavelength-dependent nonlinear absorption
MAX phase nanomaterials are emerging as a new class of real saturable absorbers (SAs) due to their compact sizes, unique electronic structures, and outstanding stability. We previously demonstrated the first MAX phase Mo2Ga2C, as an SA, enabling stable, long-term mode-locking operation around 1560 nm. Nonetheless, the wavelength-dependent saturable absorption of Mo2Ga2C beyond this wavelength remains largely unexplored. In this work, we demonstrate the wavelength dependence of the saturable absorption of the Mo2Ga2C thin film via an open-aperture Z-scan technique using a tunable Raman soliton excitation source. By redshifting the Raman soliton wavelengths within the range 1550 to 1950 nm, the nonlinear optical behavior of Mo2Ga2C at each intended spectral region is investigated as the z-step is gradually increased. Succinctly, we successfully demonstrated saturable absorption in Mo2Ga2C using a tunable Raman soliton excitation source extending to the 1.9-µm spectral region.