期刊
2D MATERIALS
卷 6, 期 4, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/2053-1583/ab39bc
关键词
2D materials; MXene; nonlinear optical properties; fiber laser; mid-infrared
资金
- National Natural Science Foundation of China (NSFC) [61775056, 11574079]
- Natural Science Foundation of Hunan Province [2017JJ1013]
- Research Fund of Science and Technology on Plasma Physics Laboratory [6142A0403050717]
- China Scholarship Council (CSC)
- R A Bowen funds at Clemson University
The strong light-matter interaction in two dimensional (2D) materials portends an untapped potential for fiber lasers in the long sought-after terahertz to mid-infrared spectral range. Here, the broadband nonlinear optical properties of zero-gap 2D Ti2CTx MXene-a class of 2D transition metal carbides that exhibit high laser damage threshold-is discussed. Using the open aperture Z-scan method, for the first time the broadband saturable absorption properties of Ti2CTx in the 800-1560 nm spectral range are demonstrated. Specifically, it is shown that the high absorption and low saturation intensity of Ti2CTx make it an ideal saturable absorber for mode-locked fiber lasers operating at 1565 and 1051 nm, which exhibited pulse widths of 5.3 ps and 164 ps, respectively. Additionally, a Ti2CTx saturable absorber was used as a Q-switcher to realize a pulsed fiber laser operating at 2.8 mu m, which showed excellent nonlinear absorption performance in the mid-infrared regime. This study significantly broadens the scope of materials available for non-linear optical applications in the near and mid-infrared regimes.
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