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Guo, Jia; Shi, Rongchao; Wang, Rui; Wang, Yunzheng; Zhang, Feng; Wang, Cong; Chen, Hualong; Ma, Chunyang; Wang, Zhenhong; Ge, Yanqi; Song, Yufeng; Luo, Zhengqian; Fan, Dianyuan; Jiang, Xiantao; Xu, Jialiang; Zhang, Han
Laser & photonics reviews, April 2020, 2020-04-00, 20200401, Letnik: 14, Številka: 4Journal Article
As a rising star of all‐carbon nanomaterial, graphdiyne (GDY) has a direct natural bandgap and features strong light–matter interaction, large optical absorption, superior chemical and optical stability, indicating its broad prospects in the field of photonics and optoelectronics. Herein, the broadband nonlinear absorption and transient absorption characteristics of GDY from visible to infrared region has been studied for the first time, and its promising application in ultrafast photonics has been explored. The large nonlinear absorption coefficient (> −1 cm GW−1), low saturation intensity (<13 GW cm−2), and ultrafast relaxation time (<30 ps) of GDY are demonstrated, which indicates the outstanding potential of GDY in photonics among the emerging novel nonlinear optical (NLO) materials. The GDY is mixed with polyvinylpyrrolidone (PVP) to prepare the GDY–PVP nanocomposite, which further improved the stability of GDY. By using the GDY–PVP nanocomposite as saturable absorption material, ultrashort pulse lasers with pulse duration of 385.5 ps and 688 fs are obtained at 1 and 1.5 µm, respectively. This work reveals the excellent nonlinear optical properties of GDY and lays a foundation for its development in advanced nanophotonic devices. 2D graphdiyne (GDY) is demonstrated to exhibit ultrafast relaxation time, large nonlinear absorption coefficient, and low saturation intensity, which indicates the outstanding potential of GDY in photonic devices. Employing the GDY‐polymer nanocomposite as a saturable absorber, highly stable ultrashort pulsed lasers has been obtained at 1 and 1.5 µm.
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