Cheng Ping Kwong, Tang Chun Yin, Wang Xin Yu, Ma Sainan, Long Hui, Tsang Yuen Hong
The Hong Kong Polytechnic University Shenzhen Research Institute, Shenzhen, Guangdong, China.
Department of Applied Physics and Materials Research Center, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China.
Sci Rep. 2019 Jul 12;9(1):10106. doi: 10.1038/s41598-019-46658-y.
Two-dimensional (2D) layered Platinum Ditelluride (PtTe), a novel candidate of group 10 transition-metal dichalcogenides (TMDs), which provides enormous potential for pulsed laser applications due to its highly stable and strong nonlinear optical absorption (NOA) properties. PtTe saturable absorber (SA) is successfully fabricated with firstly demonstrated the passively Q-switched laser operation within a Yb-doped fiber laser cavity at 1066 nm. Few layered PtTe is produced by uncomplicated and cost-efficient ultrasonic liquid exfoliation and follow by incorporating into polyvinyl alcohol (PVA) polymer to form a PtTe-PVA composite thin film saturable absorber. The highest achieved single pulse energy is 74.0 nJ corresponding to pulse duration, repetition rate and average output power of 5.2 μs, 33.5 kHz and 2.48 mW, respectively. This work has further exploited the immeasurable utilization potential of the air stable and broadband group 10 TMDs for ultrafast photonic applications.
二维（2D）层状二碲化铂（PtTe）是第10族过渡金属二硫属化物（TMD）的一种新型候选材料，由于其高度稳定且强大的非线性光学吸收（NOA）特性，在脉冲激光应用方面具有巨大潜力。成功制备了PtTe可饱和吸收体（SA），首次在1066 nm掺镱光纤激光腔内演示了被动调Q激光运转。通过简单且经济高效的超声液体剥离法制备了少层PtTe，随后将其掺入聚乙烯醇（PVA）聚合物中，形成PtTe-PVA复合薄膜可饱和吸收体。实现的最高单脉冲能量为74.0 nJ，对应的脉冲持续时间、重复频率和平均输出功率分别为5.2 μs、33.5 kHz和2.48 mW。这项工作进一步挖掘了空气稳定且宽带的第10族TMD在超快光子应用中不可估量的利用潜力。
