Unleashing the Potential of Ti₂CTₓ MXene as a Pulse Modulator for Mid-Infrared Fiber Lasers


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 µm, 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.



Research Center/Lab(s)

Center for High Performance Computing Research

Keywords and Phrases

2D materials; fiber laser; mid-infrared; MXene; nonlinear optical properties

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Document Type

Article - Journal

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© 2019 IOP Publishing Ltd, All rights reserved.

Publication Date

01 Apr 2019