<i>Ab initio</i>determination of local coupling interaction in arbitrary nanostructures: Application to photonic crystal slabs and cavities

Chen, Gengyan; Yu, Yi-Cong; Zhuo, Xiaolu; Huang, Yanyan; Jiang, Haoxiang; Liu, Jingfeng; Chen, Jin

doi:10.1103/physrevb.87.195138

Cited by 21 publications

(12 citation statements)

References 54 publications

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“…It is obvious that the AuNC/AuNF shows stronger electric field enhancements than the pure AuNC, especially at the two upper corners. As the coupling strength g is proportional to the electric field enhancements [1,43], it is reasonable to obtain the much larger Rabi splitting in the complex system of AuNC@J-agg/AuNF.…”

Section: Resultsmentioning

confidence: 99%

Compounding Plasmon–Exciton Strong Coupling System with Gold Nanofilm to Boost Rabi Splitting

et al. 2019

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Various plasmonic nanocavities possessing an extremely small mode volume have been developed and applied successfully in the study of strong light-matter coupling. Driven by the desire of constructing quantum networks and other functional quantum devices, a growing trend of strong coupling research is to explore the possibility of fabricating simple strong coupling nanosystems as the building blocks to construct complex systems or devices. Herein, we investigate such a nanocube-exciton building block (i.e. AuNC@J-agg), which is fabricated by coating Au nanocubes with excitonic J-aggregate molecules. The extinction spectra of AuNC@J-agg assembly, as well as the dark field scattering spectra of the individual nanocube-exciton, exhibit Rabi splitting of 100–140 meV, which signifies strong plasmon–exciton coupling. We further demonstrate the feasibility of constructing a more complex system of AuNC@J-agg on Au film, which achieves a much stronger coupling, with Rabi splitting of 377 meV. This work provides a practical pathway of building complex systems from building blocks, which are simple strong coupling systems, which lays the foundation for exploring further fundamental studies or inventing novel quantum devices.

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Section: Resultsmentioning

confidence: 99%

Compounding Plasmon–Exciton Strong Coupling System with Gold Nanofilm to Boost Rabi Splitting

et al. 2019

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“…In this manuscript, we only consider the case of weak QE-field coupling regime. In this regime, the SE decay lifetimes for both homogeneous and inhomogeneous environment are calculated by the formula [ 32 - 34 ]…”

Section: Methodsmentioning

confidence: 99%

Strong anisotropic lifetime orientation distributions of a two-level quantum emitter around a plasmonic nanorod

Liu

et al. 2014

Nanoscale Res Lett

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Spontaneous emission lifetime orientation distributions of a two-level quantum emitter in metallic nanorod structures are theoretically investigated by the rigorous electromagnetic Green function method. It was found that spontaneous emission lifetime strongly depended on the transition dipole orientation and the position of the emitter. The anisotropic factor defined as the ratio between the maximum and minimum values of the lifetimes along different dipole orientations can reach up to 103. It is much larger than those in dielectric structures which are only several times usually. Our results show that the localized plasmonic resonance effect provides a new degree of freedom to effectively control spontaneous emission by the dipole orientation of the quantum emitters.

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“…Recently, the emission properties of a quantum emitter (QE) in electromagnetic (EM) environments supporting EPs attracts growing attention [40,42,44,47], since the modification of spontaneous emission (SE) features a square Lorentzian profile around EPs, contrast to the nondegenerate resonances in conventional cavity with Lorentzian lineshape, and can lead to a greater enhancement of SE rate [42,44,47]. It implies that the formation of EPs in nanophotonic structures significantly alters the local density of states (LDOS), which fully describes the interaction between a QE and arbitrary EM environment [50][51][52][53]. Tailoring the LDOS of EM environment is crucial for optimizing the performance of many practical applications, ranging from traditional optoelectronic devices like lasers [54,55] and solar cells [56], to advanced quantum technologies, such as quantum light sources [57][58][59] and logical gate [60,61].…”

Section: Introductionmentioning

confidence: 99%

Anomalous spontaneous emission dynamics at chiral exceptional points

Lu¹,

Zhao²,

Li³

et al. 2022

Preprint

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An open quantum system operated at the spectral singularities where dimensionality reduces, known as exceptional points (EPs), demonstrates distinguishing behavior from the Hermitian counterpart. Based on the recently proposed microcavity with exceptional surface (ES), we report and explain the peculiar quantum dynamics in atom-photon interaction associated with EPs: cavity transparency, decoherence suppression beyond the limitation of Jaynes-Cummings (JC) system, and the population trapping of lossy cavity. An analytical description of the local density of states (LDOS) for ES microcavity is derived from an equivalent cavity quantum electrodynamics (QED) model, which goes beyond the single-excitation approximation and allows exploring the quantum effects of EPs on multiphoton process by parametrizing the extended cascaded quantum master equation. It reveals that a square Lorentzian term in LDOS induced by second-order EPs interferes with the linear Lorentzian profile, giving rise to cavity transparency for atom with special transition frequency in the weak coupling regime. This additional contribution from EPs also breaks the limit on dissipation rate of JC system bounded by bare components, resulting in the decoherence suppression with anomalously small decay rate of the long-time dynamics and the Rabi oscillation. Remarkably, we find that the cavity population can be partially trapped at EPs, achieved by forming a bound dressed state in the limiting case of vanishing atom decay. Our work unveils the exotic phenomena unique to EPs in cavity QED systems, which opens the door for controlling light-matter interaction at the quantum level through non-Hermiticity, and holds great potential in building high-performance quantum-optics devices.

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Ab initiodetermination of local coupling interaction in arbitrary nanostructures: Application to photonic crystal slabs and cavities

Cited by 21 publications

References 54 publications

Compounding Plasmon–Exciton Strong Coupling System with Gold Nanofilm to Boost Rabi Splitting

Compounding Plasmon–Exciton Strong Coupling System with Gold Nanofilm to Boost Rabi Splitting

Strong anisotropic lifetime orientation distributions of a two-level quantum emitter around a plasmonic nanorod

Anomalous spontaneous emission dynamics at chiral exceptional points

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