双条金原子链体系等离激元的激发特性

doi:10.3969/j.issn.1007-5461.2025.01.005

量子电子学报 ›› 2025, Vol. 42 ›› Issue (1): 48-0.doi: 10.3969/j.issn.1007-5461.2025.01.005

双条金原子链体系等离激元的激发特性

吴仍来 1,2*, 唐嘉尉 1, 黄恺健 1,2, 薛艺 1, 李俏璇 1

1 惠州学院电子信息与电气工程学院, 广东惠州 516007; 2 惠州学院广东省电子功能材料与器件重点实验室, 广东惠州 516007

收稿日期:2023-03-31 修回日期:2023-05-08 出版日期:2025-01-28 发布日期:2025-01-28
通讯作者: E-mail: wurenglai@sohu.com E-mail:E-mail: wurenglai@sohu.com
作者简介:吴仍来 ( 1986 - ), 江西抚州人, 博士, 副教授, 主要从事纳米结构体系中等离激元方面的研究。E-mail: wurenglai@sohu.com
基金资助:
广东省教育厅基金 (2021KTSCX130, 2021KQNCX091), 广东省科技创新战略专项资金 (pdjh2022b0499), 惠州学院教授博士科研启动项目 (2020JB009)

Excitation properties of plasmons in double Au atomic chain system

WU Renglai 1,2*, TANG Jiawei 1 , HUANG Kaijian 1,2 , XUE Yi 1 , LI Qiaoxuan 1

1 School of Electronic Information and Electrical Engineering, Huizhou University, Huizhou 516007, China; 2 Guangdong Provincial Key Laboratory of Electronic Functional Materials and Devices, Huizhou University, Huizhou 516007, China

Received:2023-03-31 Revised:2023-05-08 Published:2025-01-28 Online:2025-01-28

摘要/Abstract

摘要： 基于线性响应理论, 利用能量吸收谱研究了双条金原子链体系等离激元的频率和电荷分布。结果表明, 当链长相同时, 双条原子链的等离激元模式比单条原子链的更容易发生耦合, 表现为: 单链体系大的单一能量吸收峰在双链体系时分裂为多个尖细的峰, 且耦合的几个等离激元模式会出现相反的电荷极化方向。此外, 无论是偶极还是四极等离激元, 双条原子链最强的能量吸收峰的频率都大于单链最强能量吸收峰的频率。等离激元的尺寸效应使得同一序号的等离激元在双链体系中的频率会低于其在单链体系中的频率, 且在低频率范围, 双链体系的等离激元模式数要多于单链体系的模式数。

关键词: 光电子学, 等离激元, 线性响应理论, 双条金原子链

Abstract: Based on the linear response theory, the frequency and charge distributions of the plasmons in double Au atomic chain systems were studied using energy absorption spectroscopy. The results show that, in the case of the same chain length, the plasmon modes in double Au atomic chain are more prone to coupling with each other than those in single atomic chain, manifested as a single broad energy absorption peak in the single-chain system splitting into multiple sharp peaks in the double chain system, and the coupled plasmon modes exhibit opposite charge polarization directions. Furthermore, whether it is dipole or quadrupole plasmon, the frequency of the strongest energy absorption peak in double atomic chain is higher than that in single chain. The size effect of plasmons caused the frequencies of plasmons with the same order in a double chain system is lower than those in a single chain system, and in the low frequency range, there are more plasmon modes in a double chain system than in a single chain system.

Key words: optoelectronics, plasmon, linear response theory, double Au atomic chain

中图分类号:

O482.3

吴仍来 , 唐嘉尉 , 黄恺健 , 薛艺 , 李俏璇 . 双条金原子链体系等离激元的激发特性[J]. 量子电子学报, 2025, 42(1): 48-0.

WU Renglai , TANG Jiawei , HUANG Kaijian , , XUE Yi , LI Qiaoxuan . Excitation properties of plasmons in double Au atomic chain system[J]. Chinese Journal of Quantum Electronics, 2025, 42(1): 48-0.

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双条金原子链体系等离激元的激发特性

Excitation properties of plasmons in double Au atomic chain system

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