Ta_(2)NiSe_(5) nanosheets as a novel broadband saturable absorber for solid-state pulse laser generation  

Ta_(2)NiSe_(5)纳米片作为一种新型的宽带可饱和吸收体用于全固态脉冲激光的产生

作　　者：Bingzheng Yan Haowen Guo Guanbai He Jiajia Mao Feifei Wang Kejian Yang Baitao Zhang Jingliang He 颜秉政;郭皓文;何冠柏;毛佳佳;王菲菲;杨克建;张百涛;何京良(State Key Laboratory of Crystal Materials,Shandong University,Jinan 250100,China;School of Physics,Southeast University,Nanjing 210096,China;Collaborative Innovation Center of Light Manipulations and Applications,Shandong Normal University,Jinan 250358,China)

机构地区：[1]State Key Laboratory of Crystal Materials,Shandong University,Jinan 250100,China [2]School of Physics,Southeast University,Nanjing 210096,China [3]Collaborative Innovation Center of Light Manipulations and Applications,Shandong Normal University,Jinan 250358,China

出　　处：《Science China Materials》2021年第6期1468-1476,共9页中国科学（材料科学（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (61975095, 61675116, and 61575110);the Young Scholars Program of Shandong University (2017WLJH48);the Youth Cross Innovation Group of Shandong University (2020QNQT);the Key Research and Development Program of Shandong Province (2019JZZY020206);Shenzhen Science and Technology Research and Development Funds (JCYJ20180305163932273);the Program of State Key Laboratory of Quantum Optics and Quantum Optics Devices (KF201908)

摘　　要：Two-dimensional(2D)ternary chalcogenides have attracted great attentions because of their novel chemical and physical properties arising from the synergistic effect and stoichiometric variation with the additional third element compared with their binary counterparts.Here,high-quality 2D tantalum nickel selenide(Ta_(2)NiSe_(5))nanosheets are successfully fabricated by a liquid-phase exfoliation(LPE)method.The ultrafast excited carrier relaxation time and nonlinear optical absorption response are investigated and reveal that the prepared 2D Ta_(2)NiSe_(5)nanosheets have excellent broadband saturable absorption properties,which are further illustrated by three passively Q-switched(PQS)allsolid-state lasers operating at 1.0,2.0 and 2.8μm with the Ta_(2)NiSe_(5)nanosheet-based saturable absorber(SA).Furthermore,mode-locked laser operation with the pulse width as short as 356 fs is also realized at 1.0μm.This work not only demonstrates the excellent nonlinear optical proprieties and optical modulation performance of Ta_(2)NiSe_(5),but also paves the way for exploring the photonic and optoelectronic proprieties of ternary chalcogenide materials.三元硫族化合物与其二元的同类相比,因其多出的第三种元素而产生的协同作用和化学计量变化带来了新奇的物理化学性质,从而受到了广泛的关注.在本文中,我们通过液相剥离法成功制备了高质量的二维硒化镍钽(Ta_(2)NiSe_(5))纳米片,并进一步研究了其超快载流子弛豫特性以及非线性光学吸收特性,从而发现了所制备的Ta_(2)NiSe_(5)纳米片具有出色的宽带可饱和吸收性能.此外,利用所制备的Ta_(2)NiSe_(5)纳米片作为可饱和吸收体,实现了在1.0,2.0和2.8μm处的全固态调Q脉冲激光.同时,在1.0μm处也实现了脉冲宽度短至356 f s的固体连续锁模激光.这项工作不仅证明了Ta_(2)NiSe_(5)具有优异的非线性光学特性和光调制性能,而且为探索三元硫族化物材料的光子和光电特性铺平了道路.

关 键 词：Ta_(2)NiSe_(5) saturable absorbers passively Q-switched lasers ultrafast lasers 

分 类 号：TB383.1[一般工业技术—材料科学与工程] TN24[电子电信—物理电子学]