As a novel one-atom-thick carbon allotrope, graphdiyne (GDY) has attracted wide interest in two-dimensional materials owing to its unique feature with a planar layer comprising sp²- and sp-hybridized carbon atoms and a direct natural bandgap. A high-quality saturable absorber (SA) based on GDY was successfully fabricated, and the nonlinear saturable absorption properties were investigated. A compact diode-pumped solid-state passively Q-switched laser based on the as-prepared GDY-SA could be operated at 2 µm. The Q-switched laser delivered a maximum average output power of 1.29 W at a central wavelength of 1908.41 nm with up to 54.8% slope efficiency. A repetition rate of 91.58 kHz and single pulse energy of 23.08 µJ were obtained. This work is the first application of GDY as an SA to generate all-solid-state pulsed lasers. These results indicate that GDY is a promising SA for solid-state pulsed lasers and has further application potential for ultrafast photonic devices in the 2-µm region.

作为一种新颖的单原子厚碳同素异形体，graphdiyne（GDY）凭借其独特的特征以及包含sp ²的平面层而引起了人们对二维材料的广泛兴趣。-和sp杂化的碳原子和直接的自然带隙。成功地制造了基于GDY的高质量可饱和吸收体（SA），并研究了非线性可饱和吸收特性。基于准备好的GDY-SA的紧凑型二极管泵浦固态无源Q开关激光器可以在2 µm的波长下工作。调Q激光器在1908.41 nm的中心波长处提供的最大平均输出功率为1.29 W，斜率效率高达54.8％。获得了91.58 kHz的重复频率和23.08 µJ的单脉冲能量。这项工作是GDY作为SA产生全固态脉冲激光器的首次应用。这些结果表明，GDY是固态脉冲激光器的有前途的SA，并且对于2 µm区域的超快光子器件具有进一步的应用潜力。