標題: Correlation between Near-Field Enhancement and Dephasing Time in Plasmonic Dimers
作者: Li, Yaolong
Sun, Quan
Zu, Shuai
Shi, Xu
Liu, Yunquan
Hu, Xiaoyong
Ueno, Kosei
Gong, Qihuang
Misawa, Hiroaki
交大名義發表
National Chiao Tung University
公開日期: 24-Apr-2020
摘要: Near-field enhancement and dephasing time play critical roles in several applications of localized surface plasmon resonance. Here, using an example gold dimer system, we reveal the correlation between the near-field enhancement and dephasing time via time-resolved photoemission electron microscopy. Compared with isolated particles, dimers with small gap sizes show stronger near-field enhancement and shorter dephasing times. These results are well reproduced by numerical simulations and further explained by a coupled dipole approximation model. The roles of near- and far-field coupling and plasmon localization in balancing near-field enhancement and dephasing time are also unveiled.
URI: http://dx.doi.org/10.1103/PhysRevLett.124.163901
http://hdl.handle.net/11536/154425
ISSN: 0031-9007
DOI: 10.1103/PhysRevLett.124.163901
期刊: PHYSICAL REVIEW LETTERS
Volume: 124
Issue: 16
起始頁: 0
結束頁: 0
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