基于硫铟锌纳米花的被动调Q激光  

Passive Q-Switched Laser Based on Zinc Indium Sulfide Nanoflowers

作　　者：朱宜璇 仝鲁阳 蔡阳健 赵丽娜[1,2] 郑立仁[1,2] Zhu Yixuan;Tong Luyang;Cai Yangjian;Zhao Lina;Zheng Liren(Shandong Provincial Key Laboratory of Optics and Photonic Device,Shandong Provincial Engineering and Technical Center of Light Manipulations,School of Physics and Electronics,Shandong Normal University,Jinan 250358,Shandong,China;Joint Research Center of Light Manipulation Science and Photonic Integrated Chip of East China Normal University and Shandong Normal University,Shanghai 200241,China)

机构地区：[1]山东师范大学物理与电子科学学院,光场调控及应用中心,山东省光学与光子器件技术重点实验室,山东济南250358 [2]华东师范大学与山东师范大学光调控科学与光子集成芯片联合研究中心,上海200241

出　　处：《光学学报》2024年第4期247-253,共7页Acta Optica Sinica

基　　金：国家重点研发计划项目(2022YFA1404802,2019YFA0705000);国家自然科学基金(91950106,12274267,12192254,92250304,11974218)。

摘　　要：采用溶液法合成了二维硫铟锌纳米花,并测量了其可饱和吸收参数,其中,饱和强度为675 MW/cm^(2),调制深度为7.8%。通过搭建1μm全固态激光器,获得最大输出功率为240 mW、最大重复频率为629.08 kHz、最小脉冲宽度为388 ns、相应的单脉冲能量为0.38μJ、峰值功率为0.98 W的脉冲激光。结果表明,由于硫空位的存在,硫铟锌纳米花能够吸收能量低于其带宽的光子,在近红外区域,表现出良好的可饱和吸收特性,且在激光器中,能够获得高重复频率和短脉冲宽度的激光输出。因此,基于硫铟锌纳米材料的可饱和吸收体在调Q脉冲激光器中具有广阔的应用前景。Objective Pulse lasers have a wide range of applications in the medical treatment,communication,material processing,and other fields.Saturable absorber(SA)is a key element in triggering pulse operation,which can switch between different absorption states and produce ultrafast lasers on ultrafast timelines.In the past few years,various two-dimensional materials have been applied to ultrafast laser research,such as graphene,transition metal oxides,topological insulators,black phosphorus,and MXenes.The transition metal dichalcogenides(TMDs)put transition metals(Mo,W,Ti,Re,Hf)sandwiched between two chalcogenides(S,Se,Te)planes.This structure has reliable optical,mechanical,and electronic properties.It has become a new two-dimensional material.As SA,TMDs are widely used in pulse lasers,such as MoS_(2),ReS_(2),and WS_(2).However,TMDs typically have a high saturation light intensity(tens of GW/cm^(2)).Ternary metal sulfides(TMSs)nanomaterials have been explored by many researchers due to their ultra-wideband nonlinear optical response,high carrier mobility,and excellent air stability.The TMSs ZnIn_(2)S_(4)(ZIS)has a layered structure composed of two-dimensional[S-Zn-S-In-S-In-S]layers with tunable electronic and optical properties.Compared with traditional binary metal sulfides such as CdS and Sb_(2)S_(3),ZIS has the advantages of low toxicity,good chemical stability,simple preparation method,and abundant sources.In terms of optical properties,ZIS has a high optical absorption coefficient and strong optical stability.In addition,the charge transport characteristics of ZIS are changed due to the presence of abundant sulfur vacancies.It is necessary to study the layered ZIS with sulfur vacancies as efficient SA.Methods In this paper,we synthesize ZIS nanoflowers with sulfur vacancies by solution method.The morphology,phase structure,and ultraviolet-visible(UV-Vis)diffuse reflection spectra of ZIS nanoflowers are analyzed by scanning electron microscopy(SEM),X-ray diffraction(XRD),and ultraviolet-visible-near infrared(UV-V

关 键 词：非线性光学 脉冲激光 可饱和吸收体 二维材料 硫空位 硫铟锌 

分 类 号：TN248.1[电子电信—物理电子学]