Enhancing the light-matter coupling using a 3D-graphene-dielectric-micro-cavity.

Area of Science:

• Quantum optics
• Plasmonics
• Materials science

Background:

• Quantum emitters (QE) interact with their electromagnetic environment.
• Surface plasmons (SPs) are collective electron oscillations on metal or graphene surfaces.
• Enhancing light-matter interactions is crucial for quantum technologies.

Purpose of the Study:

• To propose a novel 3D graphene-cube cavity for improved electromagnetic coupling.
• To investigate the interaction between a quantum emitter and plasmonic cavity modes.
• To explore strategies for controlling quantum emitter dynamics and enabling novel quantum phenomena.

Main Methods:

• Theoretical proposal of a 3D graphene-cube cavity structure.
• Analysis of the cavity's electromagnetic bands (high-frequency SPs and low-frequency reflections).
• Modeling the resonant coupling between a quantum emitter and the plasmonic cavity modes.

Main Results:

• Significantly enhanced relaxation rate of the quantum emitter compared to free space.
• Demonstration of reversible population dynamics.
• Ability to selectively enhance coupling with the low-frequency plasmonic band.
• Observation of quantum emitter population trapping in the excited state, forming a bound state.

Conclusions:

• The 3D graphene-cube cavity offers a novel strategy for enhancing quantum emitter-surface plasmon coupling.
• The cavity enables control over quantum emitter relaxation rates and population dynamics.
• This work paves the way for developing advanced chip-scale quantum plasmonic devices.