Nonlinear Quantum Optics with Trion Polaritons in 2D Monolayers: Conventional and Unconventional Photon Blockade

Area of Science:

• Quantum optics
• Condensed matter physics
• Materials science

Background:

• Trion polaritons are quasiparticles formed by the interaction of excitons (bound electron-hole pairs) and photons.
• Monolayer semiconductors, like transition metal dichalcogenides (TMDs), offer unique platforms for studying quantum phenomena due to their reduced dimensionality.

Purpose of the Study:

• To investigate the quantum optical properties of 2D trion polaritons in monolayer semiconductors.
• To explore the potential for strong optical nonlinearity and single-photon emission in these systems.
• To develop a theoretical framework for understanding the quantum statistics of trion polaritons.

Main Methods:

• Development of a full quantum theory to describe the statistical properties of trion polaritons.
• Analysis of phase space filling effects and their contribution to optical nonlinearity.
• Investigation of photon antibunching regimes under varying single photon-trion coupling strengths.

Main Results:

• Demonstration of a strongly nonlinear optical response in 2D trion polaritons within monolayer semiconductors.
• Identification of nontrivial quantum statistical properties and enhanced phase space filling as key mechanisms for nonlinearity.
• Observation of two distinct photon antibunching regimes, indicating feasibility of single-photon emission.
• Theoretical prediction of experimental feasibility in state-of-the-art TMD setups.

Conclusions:

• 2D trion polaritons in monolayer semiconductors exhibit significant optical nonlinearity, driven by their quantum nature.
• The study provides a theoretical foundation for quantum polaritonics using 2D materials.
• Single-photon emission from trion polaritons is achievable, paving the way for novel quantum devices.