利用重离子径迹模版法制备出的钯纳米线阵列的表面等离激元共振现象研究（英文）  

Surface Plasmon Resonances of Palladium Nanowire Arrays Prepared by Ion Track Technology

作　　者：赵丛 黄科京 吕双宝 徐国恒 程宏伟 刘杰[1] 姚会军[1] 孙友梅[1] 徐丽君 段敬来[1] ZHAO Cong;HUANG Kejing;LU Shuangbao;XU Guoheng;CHENG Hongwei;LIU Jie;YAO Huijun;SUN Youmei;XU Lijun;DUAN Jinglai(Materials Research Center,Institute of Modern Physics,Chinese Academy of Sciences,Lanzhou;University of Chinese Academy of Sciences,Beijing 100049,China;School of Physical Science and Technology,Lanzhou University,Lanzhou 730000,China;Southwest Jiaotong University,Chengdu 610000,China)

机构地区：[1]中国科学院近代物理研究所材料研究中心,兰州730000 [2]中国科学院大学,北京100049 [3]兰州大学物理科学与技术学院,兰州730000 [4]西南交通大学,成都610000

出　　处：《原子核物理评论》2018年第3期313-320,共8页Nuclear Physics Review

基　　金：Key Research Program of Frontier Sciences,CAS(QYZDB-SSW-SLH010);National Natural Science Foundation of China(11375241,11474240,11575261)~~

摘　　要：利用电化学沉积在重离子径迹模版中制备出了不同直径的一维钯纳米线。利用扫描电子显微镜、透射电子显微镜和X射线衍射等多多种手段对制得的钯纳米线进行了形貌和结构表征。利用紫外可见光谱仪分析了钯纳米线的光学响应,发现钯纳米线存在表面等离子体共振现象。随着纳米线直径和长度的增加,其表面等离子体共振峰位发生红移;通过改变光谱测试中激发光的入射角度,其表面等离激元共振模式会随着角度的增大而变多,这可能是在横向振动模式的基础上激发了沿纳米线长度方向振动的纵向模式。与此同时,基于时域有限差分法对钯纳米线的表面等离子体共振特性进行数值模拟,结果与实验符合较好。Palladium nanowires with varied diameters were fabricated using ion-track templates coupled with electrochemical deposition. The morphology and crystallographic structure were characterized with Scanning Electron Microscopy, Transmission Electron Microscopy, X-ray diffraction（XRD）. The plasmonic responses of the as-prepared nanowires were investigated by UV-Vis-NIR spectroscopy and the simulations based on the finite-difference time-domain algorithm. The results demonstrate that the surface plasmon resonances of Pd nanowire are sensitive to the wire geometry, but also influenced by the incidence angle of light. The frequency of the transverse dipolar plasmon resonance of nanowire arrays shifts within a wide range from visible to near infrared. With increasing of wires＇ diameter or length, the resonance peak shifts to the red. With increasing of incident angle, a new peak appears, which is possibly assigned to the excitation of the longitudinal resonance. In addition, numerical simulations disclose that propagating surface plasmon polaritons can be excited on the palladium nanowires and the wavelength of the resonance peak is in good agreement with the experimental results.

关 键 词：离子径迹 钯纳米线 表面等离激元共振 紫外-可见-红外吸收光谱 

分 类 号：O571.33[理学—粒子物理与原子核物理]