https://doi.org/10.1140/epjd/s10053-022-00521-4
Regular Article – Optical Phenomena and Photonics
Dynamic modulation of multi-mode ultra-strong coupling at ambient conditions
1
State Key Laboratory of Information Photonics and Optical Communications, Beijing University of Posts and Telecommunications, 100876, Beijing, China
2
School of Science, Beijing University of Posts and Telecommunications, 100876, Beijing, China
3
College of Mathematics and Physics, Beijing University of Chemical Technology, 100029, Beijing, China
Received:
20
April
2022
Accepted:
30
September
2022
Published online:
20
October
2022
We theoretically investigated the multi-mode coupling among the localized surface plasmon resonance, the lattice mode in Ag nanorod array, and the resonant Fabry–Perot microcavity using the finite-difference time-domain (FDTD) method. A huge Rabi splitting of 1.46 eV and anti-crossing behavior in the new established hybrid modes are observed in the calculated absorption spectra of the hybrid nanostructure. The coupling system can be controlled by adjusting the thickness of the Fabry–Perot microcavity. We further analyze the weighting efficiencies of each original mode by calculating the Hopfield factor using the coupled oscillator model. Our work proposes the tunable multi-mode ultra-strong coupling system, which paves the way for room-temperature quantum applications such as optical modulators, multi-mode lasers, and multi-mode sensors in the optical and infrared ranges.
Li Yu and Kun Liang are contributed equally to this work.
Supplementary Information The online version contains supplementary material available at https://doi.org/10.1140/epjd/s10053-022-00521-4.
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