Second-order coherence function of a plasmonic nanoantenna fed by a single-photon source

Area of Science:

• Quantum optics
• Plasmonics
• Nanophotonics

Background:

• Single-photon sources are crucial for quantum technologies.
• Plasmonic nanoantennas can enhance light-matter interactions.
• The Purcell effect significantly influences emission rates.

Purpose of the Study:

• To analyze the second-order coherence of a plasmonic nanoantenna coupled to a single-photon source.
• To investigate the role of thermal fluctuations and coupling strength on emission statistics.
• To explore the potential for creating high-intensity single-photon sources.

Main Methods:

• Theoretical study of the second-order coherence function.
• Analysis of a single-photon source under continuous wave incoherent pumping.
• Consideration of the strong Purcell effect regime.

Main Results:

• Emission statistics approach thermal radiation when kT >> ℏΩ_R.
• Emission approaches single-photon statistics when ℏΩ_R >> kT.
• Demonstrated potential to exceed the radiation intensity of individual single-photon sources.

Conclusions:

• The coupling regime dictates the emission statistics.
• Strong coupling enables enhanced single-photon emission.
• This work paves the way for high-intensity single-photon sources.