Broadband 1T-titanium selenide-based saturable absorbers for solid-state bulk lasers
Broadband 1T-titanium selenide-based saturable absorbers for solid-state bulk lasers
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用于固态体激光器的宽带 1T 硒化钛基可饱和吸收器
DOI：
10.1039/c8nr03859g
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发表时间：
2018
期刊：
影响因子：
6.7
通讯作者：
He Jingliang
中科院分区：
文献类型：
--
作者：
Yan Bingzheng;Zhang Baitao;Nie Hongkun;Li Guoru;Sun Xiaoli;Wang Yiran;Liu Junting;Shi Bingnan;Liu Sh;e;He Jingliang
1 T-硒化钛（1 T-TiSe 2）是1 T相过渡金属二硫属化合物（TMD）的代表，具有近零禁带结构的半金属性质，是一种很有前途的光电材料。采用液相剥离法和旋涂法相结合的方法成功制备了高质量的1 T-TiSe_2多层可饱和吸收体。利用开孔Z扫描方法研究了1 T-TiSe 2 SA的宽带非线性饱和吸收特性。利用1 T-TiSe_2 SA晶体实现了1.0、1.3、2.0和2.8 μm波长的被动调Q（PQS）全固态激光器。据我们所知，这是首次将1 T-TiSe 2材料应用于全固态体激光器。结果表明，1 T-TiSe 2可以作为固体脉冲激光器的替代宽带SA，并在锁模超快激光器中具有良好的应用前景。
1T-titanium selenide (1T-TiSe2), a representative of 1T phase transition metal dichalcogenides (TMDs), exhibits semimetallic behaviour with a nearly zero bandgap structure, which makes it a promising photoelectric material. A high-quality multilayer 1T-TiSe2 saturable absorber (SA) is successfully fabricated by a combination of liquid phase exfoliation and the spin coating method. The broadband nonlinear saturable absorption properties of the prepared 1T-TiSe2 SA are investigated by using the open aperture (OA) Z-scan method. Passively Q-switched (PQS) all-solid-state lasers with different bulk crystals at the wavelengths of 1.0, 1.3, 2.0 and 2.8 μm are realised based on the 1T-TiSe2 SA. To the best of our knowledge, this is the first presentation of the application of a 1T-TiSe2 material to all-solid-state bulk lasers. The results indicate that 1T-TiSe2 could be an alternative broadband SA for solid-state pulsed lasers and exhibits promising potential applications in mode-locked ultrafast lasers.