Thermal detection of surface plasmons on gold nanohole arrays  

作　　者：ZHANG Wei LI ZhiPeng GUAN ZhiQiang SHEN Hao YU WenBo He WeiDong YAN XiaoPeng LI Ping XU HongXing 

机构地区：[1]Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China [2]Beijing Key Laboratory of Nano-Photonics and Nano-Structure(NPNS),Department of Physics,Capital Normal University,Beijing 100048 China [3]Information Awareness and Confrontation,Beijing Institute of Technology,Beijing 100081,China [4]Division of Solid State Physics,Lund University,Lund 22100,Sweden

出　　处：《Chinese Science Bulletin》2012年第1期68-71,共4页

基　　金：supported by National Natural Science Foundation of China(10874233);National Basic Research Program of China(2009CB930700)

摘　　要：We used a thin-film thermocouple to detect the thermal effect of surface plasmons excited in Au nanohole array structures.We found that the thermal electromotive force of Au film with periodic nanohole structures is three times greater than that of a bare Au film for 785-nm laser excitation at a given power.This effect is caused by the resonant excitation of localized surface plas- mons in the nanoholes.In addition,we found that the thermal electromotive force(EMF)of the Au film with dumbbell-like na- nohole arrays depends strongly on the incident polarization.The thermal EMF is the greatest when the excitation light is polarized perpendicular to the long axis of the dumbbell.We used a thin-film thermocouple to detect the thermal effect of surface plasmons excited in Au nanohole array structures. We found that the thermal electromotive force of Au film with periodic nanohole structures is three times greater than that of a bare Au film for 785-nm laser excitation at a given power. This effect is caused by the resonant excitation of localized surface plasmons in the nanoholes. In addition, we found that the thermal electromotive force （EMF） of the Au film with dumbbell-like nanohole arrays depends strongly on the incident polarization. The thermal EMF is the greatest when the excitation light is polarized perpendicular to the long axis of the dumbbell.

关 键 词：纳米孔阵列结构 表面等离子体 检测 黄金 热电动势 激光激发 薄膜热电偶 纳米孔结构 

分 类 号：O647.33[理学—物理化学] TB383[理学—化学]