SPP standing waves within plasmonic nanocavities

Yang，Da Jie1; Ding，Si Jing2; Ma，Liang3; Mu，Qing Xia1; Wang，Qu Quan4

2022-11-21

10.1364/OE.475586

OPTICS EXPRESS   Impact Factor & Quartile

1094-4087

1094-4087

Surface plasmons usually take two forms: surface plasmon polaritons (SPP) and localized surface plasmons (LSP). Recent experiments demonstrate an interesting plasmon mode within plasmonic gaps, showing distinct characters from the two usual forms. In this investigation, by introducing a fundamental concept of SPP standing wave and an analytical model, we reveal the nature of the recently reported plasmon modes. The analytical model includes SPP propagating and SPP reflection within a metal-insulator-metal (MIM) cavity, which is rechecked and supplemented by numerical simulations. We systematically analyze SPP standing waves within various nanocavities. During the discussion, some unusual phenomena have been explained. For example, the hot spot of a nanodimer could be off-tip, depending on the order of standing wave mode; and that a nanocube on metal film can be viewed as a nanocube dimer with the same separation. And many other interesting phenomena have been discussed, such as dark mode of SPP standing wave and extraordinary optical transmission. The study gives a comprehensive understanding of SPP standing waves, and may promote the applications of cavity plasmons in ultrasensitive bio-sensings.

SCI

English

Others

National Natural Science Foundation of China[11934003];National Key Research and Development Program of China[2017YFA0303402];National Key Research and Development Program of China[2017YFA0303404];Fundamental Research Funds for the Central Universities[2021MS046];National Natural Science Foundation of China[NSAF U1930402];

Optics

Optics

WOS:000901314100099

Optica Publishing Group

PHYSICS

2-s2.0-85142066360

Scopus

1.Mathematics and Physics Department,North China Electric Power University,Beijing,102206,China
2.School of Mathematics and Physics,China University of Geosciences (Wuhan),Wuhan,430074,China
3.Hubei Key Laboratory of Optical Information and Pattern Recognition,Wuhan Institute of Technology,Wuhan,430205,China
4.Department of Physics,Southern University of Science and Technology,Shenzhen,518055,China

Yang，Da Jie,Ding，Si Jing,Ma，Liang,et al. SPP standing waves within plasmonic nanocavities[J]. OPTICS EXPRESS,2022,30(24):44055-44070.

Yang，Da Jie,Ding，Si Jing,Ma，Liang,Mu，Qing Xia,&Wang，Qu Quan.(2022).SPP standing waves within plasmonic nanocavities.OPTICS EXPRESS,30(24),44055-44070.

Yang，Da Jie,et al."SPP standing waves within plasmonic nanocavities".OPTICS EXPRESS 30.24(2022):44055-44070.