Enhanced Strong Interaction between Nanocavities and p-shell Excitons Beyond the Dipole Approximation

Area of Science:

• Quantum optics
• Condensed matter physics

Background:

• Strong exciton-photon interactions are crucial for quantum photonic networks.
• Current research primarily focuses on s-shell excitons, which exhibit limited coupling strengths.

Purpose of the Study:

• To demonstrate strong interactions between cavities and p-shell excitons.
• To enhance coupling strengths beyond the dipole approximation.
• To explore the potential of p-shell excitons for quantum information technologies.

Main Methods:

• In situ wave-function control to manipulate exciton properties.
• Tuning interactions from nonlocal to local regimes via wave function shrinking.
• Utilizing p-shell excitons with larger wave-function extents.
• Developing a distributed delay model to explain coupling strength variations.

Main Results:

• Achieved significantly larger wave-function extents and nonlocal interactions for p-shell excitons.
• Demonstrated tunable interactions from nonlocal to local regimes with wave function shrinking.
• Obtained a large coupling strength of 210 μeV.
• Revealed intertwining of excitons and photons beyond the dipole approximation.

Conclusions:

• P-shell excitons offer a promising platform for achieving strong coupling strengths in quantum photonic networks.
• The demonstrated control over wave functions and interactions provides a pathway for enhanced coherent information exchange.
• The findings highlight the potential of p-shell excitons for advancing quantum technologies.