Photon blockade with high photon occupation via cavity electromagnetically induced transparency

Area of Science:

• Quantum optics
• Solid-state physics

Background:

• Photon blockade (PB) is crucial for generating high-purity single-photon sources.
• Achieving both significant sub-Poissonian statistics and high mean photon numbers is essential for bright and pure sources.

Purpose of the Study:

• To propose and investigate photon blockade at the cavity dark-state polariton (DSP) using a cavity Λ-type electromagnetically induced transparency (EIT) system.
• To explore the role of two-photon dissipation (TPD) in achieving PB in this system.

Main Methods:

• Utilizing a cavity Λ-type EIT system with and without TPD.
• Analyzing PB in both Raman resonance and slightly detuned Raman resonance cases.
• Investigating weak, intermediate, and strong coupling regimes.

Main Results:

• PB at DSP is realized via TPD in weak/intermediate coupling for Raman resonance, yielding high photon occupation.
• PB at DSP is achieved through quantum destructive interference (QDI) in strong coupling for detuned resonance, further enhanced by TPD.
• The detuned case offers high photon occupation and tunability for PB.

Conclusions:

• This work presents an alternative method for manipulating photon statistics via PB.
• The proposed approach enables the generation of single-photon sources with enhanced brightness and purity.
• The findings have potential applications in quantum information processing and quantum communication.