Abstract
We present a strong coupling system realized by coupling the localized surface plasmon mode in individual silver nanogrooves and propagating surface plasmon modes launched by periodic nanogroove arrays with varied periodicities on a continuous silver medium. When the propagating modes are in resonance with the localized mode, we observe a âšN scaling of Rabi splitting energy, where N is the number of propagating modes coupled to the localized mode. Here, we confirm a giant Rabi splitting on the order of 450-660 meV (N = 2) in the visible spectral range, and the corresponding coupling strength is 160-235 meV. In some of the strong coupling cases studied by us, the coupling strength is about 10% of the mode energy, reaching the ultrastrong coupling regime.
Original language | English |
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Pages (from-to) | 605-611 |
Number of pages | 7 |
Journal | Nano letters |
Volume | 21 |
Issue number | 1 |
DOIs | |
State | Published - 13 Jan 2021 |
Keywords
- localized surface plasmon resonance
- silver surface plasmon lattice
- strong coupling
- surface plasmon polariton