Plasmonic hybridization properties in polyenes octatetraene molecules based on theoretical computation  

作　　者：高楠 朱国栋 黄映洲 方蔚瑞 Nan Gao;Guodong Zhu;Yingzhou Huang;Yurui Fang(Key Laboratory of Materials Modification by Laser,Electron,and Ion Beams(Ministry of Education),and School of Physics,Dalian University of Technology,Dalian 116024,China;State Key Laboratory of Coal Mine Disaster Dynamics and Control,Chongqing University,Chongqing 400044,China)

机构地区：[1]Key Laboratory of Materials Modification by Laser,Electron,and Ion Beams(Ministry of Education),and School of Physics,Dalian University of Technology,Dalian 116024,China [2]State Key Laboratory of Coal Mine Disaster Dynamics and Control,Chongqing University,Chongqing 400044,China

出　　处：《Chinese Physics B》2023年第3期419-428,共10页中国物理B（英文版）

基　　金：the National Natural Science Foundation of China(Grant Nos.12274054 and 12074054);the Fundamental Research Funds for the Central Universities(Grant No.DUT21LK06).

摘　　要：Relationship of plasmonic properties of multiple clusters to molecular interactions and properties of a single cluster or molecule have become increasingly important due to the continuous emergence of molecular and cluster devices or systems.A hybrid phenomenon similar to plasmonic nanoparticle hybridization exists between two molecules with plasmon excitation modes.We use linear-response time-dependent density functional theory,real-time propagation time-dependent density functional theory,the plasmonicity index,and transition contribution maps(TCMs)to identify the plasmon excitation modes for the linear polyenes octatetraene with–OH and–NH_(2)groups and analyze the hybridization characteristics using charge transitions.The results show that molecular plasmon hybridization exists when the two molecules are coupled.The TCM analysis shows that the plasmon modes and hybridization result from collective and single-particle excitation.The plasmon mode is stronger,and the individual properties of the molecules are maintained after coupling when there is extra charge depose in the molecules because the electrons are moving in the molecules.This study provides new insights into the molecular plasmon hybridization of coupled molecules.

关 键 词：plasmon hybridization molecular plasmon time-dependent density functional theory(TDDFT) 

分 类 号：O469[理学—凝聚态物理]