AI Article Synopsis
- Stanene-based materials, resembling graphene's hexagonal structure, show promise for photoelectric applications, but their nonlinear optical properties are not well-studied.
- Different sizes of stanene, including 2D nanosheets and 0D nanodots, were produced using liquid phase exfoliation and differential centrifugation methods.
- Z-scan measurements indicated that 2D Sn nanosheets exhibit high saturable absorption, while 0D Sn nanodots show reverse saturable absorption due to stronger excited state absorption and quicker exciton relaxation, suggesting new applications in laser shielding and ultrafast photonics.
Article Abstract
Stanene (Sn)-based materials, with a graphene-like hexagonal structure, are now attracting considerable interest for potential applications in photoelectricity. However, the nonlinear optical properties of stanene remain largely unexplored. In this work, we prepared different sizes of stanene by liquid phase exfoliation and differential centrifugation methods, including two-dimensional (2D) Sn nanosheets (NSs) and zero-dimensional (0D) Sn nanodots (NDs). Z-scan measurements reveal that 2D Sn NSs exhibited high saturable absorption behavior, while the 0D Sn NDs led to reverse saturable absorption. Femtosecond ultrafast transient absorption spectra revealed that the reverse saturable absorption of Sn NDs is derived from a stronger excited state absorption and faster exciton relaxation dynamics. This research expands the potential applications of stanene in laser shielding and other ultrafast photonics technologies.
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| http://dx.doi.org/10.1021/acsami.4c10938 | DOI Listing |
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