Photonics Research, 2020, 8 (3): 03000343, Published Online: Feb. 21, 2020
Quantum versus optical interaction contribution to giant spectral splitting in a strongly coupled plasmon–molecules system 
Download： 779次
Figures & Tables
Fig. 1. Schematic illustration of energy level and spectra in emitter-field coupling system. (a) Upper panel, energy-level splitting in single atom interacting with optical field. Here ω a ω c ℏ | e ⟩ | g ⟩ | c ⟩ Δ δ ω 0 Δ δ ′
Fig. 2. Schematic illustration of methylene blue molecules embedded in the nanogap of an NPoM structure and their quantum and optical interaction with plasmons excited by incident light. (a) A single methylene blue molecule placed in the hot spot (with the maximum electric field enhancement) of the nanogap, as depicted by the red circle. The Rabi splitting due to plasmon–molecules strong coupling can be reflected by the scattering light and fluorescence, but the weak fluorescence will be absorbed by plasmonic structure and become hard to detect. (b) In multi-molecule level, the real Rabi splitting can only be reflected by fluorescence, while the scattering light involves not only the Rabi splitting but also complex optical interaction. (c) Chemical structure of methylene blue molecule.
Fig. 3. Engineering plasmonic resonance in an NPoM structure by changing the physical and geometric properties. (a) Schematic diagram of the NPoM structure; (b) electric field intensity distributions of NPoM in the vertical x - z x - y x - y
Fig. 4. Vacuum Rabi splitting in a single molecule–plasmon system, when a methylene blue molecule is in resonance with plasmon (detuning δ = 0 ω + ω −
Fig. 5. Scattering spectra of an optical interaction system that consists of multiple methylene blue molecules coupling to plasmon. (a) Two molecules, the interval of the splitting peaks Δ = 120 meV ω + = 602.6 nm ω − = 640 nm Δ = 182 meV ω + = 597.6 nm ω − = 655 nm Δ = 290 meV ω + = 591 nm ω − = 686 nm Ω optical = N Ω R
Bo Wang, Xian-Zhe Zeng, Zhi-Yuan Li. Quantum versus optical interaction contribution to giant spectral splitting in a strongly coupled plasmon–molecules system[J]. Photonics Research, 2020, 8(3): 03000343.
PDF全文
