新型过渡金属硫化物在超快激光中的应用

Application of emerging transition metal dichalcogenides in ultrafast lasers

超快激光技术是目前激光乃至物理学和信息科学领域最活跃的研究前沿之一,在工业加工、生物医学和激光雷达等领域具有广泛应用。二维材料具有独特的物理结构及优异的光电特性,作为可饱和吸收体应用于超快激光器时,具备工作波段宽、调制深度可控和恢复时间快等优势。其中,过渡金属硫化物因具有带隙连续可调等特点,已成为二维材料研究领域的重点。本文从过渡金属硫化物的特性出发,介绍了可饱和吸收器件的制作方法,综述了基于新型过渡金属硫化物的超快激光器的研究进展,并对其发展趋势进行了展望。

Ultrafast laser technology is one of the most active research frontiers in lasers,physics and information science.It is widely applied in industrial processing,biomedicine,lidar and other fields.Because of their unique physical structure and excellent photoelectric properties,two-dimensional materials have a wide operating band,controllable modulation depth and short recovery time when they are employed as saturable absorbers in ultrafast lasers.Among them,transition metal dichalcogenides have become a focus of research because their band-gap is continuously adjustable.In this paper,we introduce the characteristics of transition metal dichalcogenides and the fabrication methods of saturable absorber devices.The research progress of ultrafast lasers based on emerging transition metal dichalcogenides is reviewed,and the development trend is highlighted.