Plasmon-induced nonlinear response on gold nanoclusters  

作　　者：宋玉慧 曹逸飞 黄思晨 李凯超 杜如海 严蕾 付正坤 张正龙 Yuhui Song;Yifei Cao;Sichen Huang;Kaichao Li;Ruhai Du;Lei Yan;Zhengkun Fu;Zhenglong Zhang(School of Physics and Information Technology,Shaanxi Normal University,Xi'an 710119,China)

机构地区：[1]School of Physics and Information Technology,Shaanxi Normal University,Xi'an 710119,China

出　　处：《Chinese Physics B》2024年第4期36-39,共4页中国物理B（英文版）

基　　金：Project supported by the National Key R&D Program of China (Grant Nos.2020YFA0211300 and 2021YFA1201500);the National Natural Science Foundation of China (Grant Nos.U22A6005,92150110,12074237,and 12304426);the Natural Science Foundation of Shaanxi Province (Grant No.2024JC-JCQN-07);the Fundamental Science Foundation of Shaanxi (Grant No.22JSZ010);the Fundamental Research Funds for Central Universities (Grant Nos.GK202201012 and GK202308001)。

摘　　要：The plasmon-induced nonlinear response has attracted great attention in micro-nano optics and optoelectronics applications,yet the underlying microscopic mechanism remains elusive.In this study,the nonlinear response of gold nanoclusters when exposed to a femtosecond laser pulse was investigated using time-dependent density functional theory.It was observed that the third-order tunneling current was augmented in plasmonic dimers,owing to a greater number of electrons in the dimer being excited from occupied to unoccupied states.These findings provide profound theoretical insights and enable the realization of accurate regulation and control of nonlinear effects induced by plasmons at the atomic level.

关 键 词：PLASMON nonlinear optics time-dependent density functional theory(TDDFT) 

分 类 号：O53[理学—等离子体物理]