Condensation in disordered lasers: theory, 3D+1 simulations, and experiments.

Area of Science:

• Optics and Photonics
• Quantum Optics
• Condensed Matter Physics

Background:

• The mechanisms behind coherent emission in systems with structural disorder, involving photon multiple scattering and wave localization, remain largely uninvestigated.
• Understanding these processes is crucial for advancing laser technology and fundamental physics.

Purpose of the Study:

• To explore the complex phenomena of coherent emission generation in disordered colloidal laser systems.
• To identify a unifying theoretical framework that can quantitatively describe experimental observations.

Main Methods:

• Utilizing a single nonlinear Schrödinger equation as a theoretical model.
• Performing three-dimensional time-domain parallel simulations.
• Comparing simulation results with experimental data from colloidal laser systems.

Main Results:

• The nonlinear Schrödinger equation accurately reproduces experimental results for colloidal lasers.
• The model successfully captures the complex interplay of photon scattering and wave localization.
• The study establishes a quantitative link between theoretical predictions and experimental outcomes.

Conclusions:

• A single nonlinear Schrödinger equation provides a powerful and accurate description of coherent emission in disordered colloidal lasers.
• This work offers a new perspective on wave localization and light-matter interactions in complex optical systems.
• The findings pave the way for designing and controlling novel laser functionalities.