用于产生红外脉冲的碲烯纳米片的化学气相输运生长  

Chemical Vapor Transport Grown Tellurium Nanoflakes for Infrared Pulse Generation

作　　者：庞修洋 赵新新 俞强 邓海芹 刘方奇 张严 殳博王 贤天浩 朱思聪 吴坚 侯义锋 张凯[2] 姜宗福[1] Pang Xiuyang;Zhao Xinxin;Yu Qiang;Deng Haiqin;Liu Fangqi;Zhang Yan;Shu Bowang;Xian Tianhao;Zhu Sicong;Wu Jian;Hou Yifeng;Zhang Kai;Jiang Zongfu(College of Advanced Interdisciplinary Studies,State Key Laboratory of Pulsed Power Laser Technology,Hunan Provincial Key Laboratory of High Energy Laser Technology,National University of Defense Technology,Changsha 410073,Hunan,China;i-Lab&Key Laboratory of Nanodevices and Applications,Key Laboratory of Nanophotonic Materials and Devices,Suzhou Institute of Nano-Tech and Nano-Bionics,Chinese Academy of Sciences,Suzhou 215123,Jiangsu,China;The State Key Laboratory for Refractories and Metallurgy,Wuhan University of Science and Technology,Wuhan 430081,Hubei,China;School of Physics and Astronomy,Shanghai Jiao Tong University,Shanghai 200240,China;College of Electronical and Information Engineering,Wuzhou University,Wuzhou 543001,Guangxi,China)

机构地区：[1]国防科技大学前沿交叉学科学院,脉冲功率激光技术国家重点实验室,高能激光技术湖南省重点实验室,湖南长沙410073 [2]中国科学院苏州纳米技术与纳米仿生研究所,创新实验室,纳米器件与应用重点实验室,纳米光子材料与器件重点实验室,江苏苏州215123 [3]武汉科技大学耐火材料和冶金学国家重点实验室,湖北武汉430081 [4]上海交通大学物理与天文学院,上海200240 [5]梧州学院电子与信息工程学院,广西梧州543001

出　　处：《中国激光》2023年第1期230-237,共8页Chinese Journal of Lasers

基　　金：国家自然科学基金(61922082,61875223,61927813);中国科学院纳米器件与应用重点实验室开放课题(21YZ03)。

摘　　要：碲烯具有宽带吸收、高迁移率和独特的拓扑性质,在红外光学应用领域被寄予厚望。本团队利用化学气相输运方法制备了高结晶性碲烯纳米片;结合精准的端面转移技术,获得了利于光纤集成的可饱和吸收体;基于碲烯的非线性饱和吸收特性,在1.55μm波段实现了稳定的被动调Q脉冲输出,中心波长约为1558 nm,脉冲宽度约为1.44μs,重复频率在87~133 kHz范围内可调。本研究结果拓展了新型碲烯纳米材料的应用场景,为可调谐脉冲激光提供了解决方案。Objective In recent years,low-dimensional materials have received significant attention in optics and demonstrated excellent application prospects.In the previous studies,numerous carbon,nitrogen,and oxygen group single element films,such as arsenic,antimony,and tellurium,have been obtained.Tellurene is a basic material of the oxygen group with a helical chain structure.It may form various morphologies,such as nanowires,nanorods,nanotubes,or nanoribbons.On the one hand,preparing a thin layer of single tellurene crystal remains a challenge.On the other hand,as one of the chalcogenide elements(groupⅥmaterials),tellurene is a promising material for infrared optical applications because of its wideband absorption,high mobility,and unique topological properties.The electrical and topological properties of tellurene single crystals have been systematically studied.A second harmonic property in the optical nonlinear characteristics has also been observed.However,nonlinear applications,especially an ultrafast pulsed fiber laser based on the saturable absorption of tellurene,require further studies.In the present study,tellurene nanoflakes with high crystallinity were prepared by adopting the chemical vapor transport method.Using the precise transfer technology,the tellurium nanoflakes were integrated into the tip of the optical fiber as fiber-compatible saturable absorbers.The nonlinear saturation absorption property enabled achieving stable passively Q-switched laser pulses.It is envisaged that the present work will extend the range of applications of novel tellurene nanomaterials and provide a potential means of obtaining tunable pulsed lasers.Methods A tellurene-based saturable absorber was prepared using a bottom-up approach and then used for laser pulse generation.Firstly,tellurium powder and mica substrate were placed on each side of the middle-necked quartz tube.The quartz tube was sealed under vacuum and then placed in a double temperature zone furnace.By executing an appropriate temperature program,the source

关 键 词：激光器 纳米材料 可饱和吸收体 被动调Q 可调谐脉冲激光 碲烯 

分 类 号：TN248.1[电子电信—物理电子学]