Analysis of mid-infrared lasing in active random media

Area of Science:

• Photonics and optical engineering
• Condensed matter physics
• Materials science

Background:

• Random lasers offer unique properties due to light scattering.
• Mid-Infrared (Mid-IR) applications require specialized laser sources.
• Controlling lasing behavior in disordered systems is crucial.

Purpose of the Study:

• Investigate the lasing behavior of 2D active random structures in the Mid-IR region.
• Analyze the impact of varying scattering intensity on lasing properties.
• Determine the relationship between input power, scattering, and the lasing threshold.

Main Methods:

• Developed a Monte Carlo-based simulation tool incorporating optical amplification.
• Simulated photon travel distance within the 2D active random structures.
• Varied input power and scattering intensity to observe lasing phenomena.

Main Results:

• Observed distinct random lasing behavior in the designed structures.
• Identified a clear dependence of the lasing threshold on scattering intensity.
• Simulated results demonstrated good agreement with experimental data.

Conclusions:

• Scattering intensity is a critical parameter for controlling random lasing in 2D Mid-IR structures.
• The developed simulation tool accurately models the observed lasing phenomena.
• This research provides insights for designing efficient Mid-IR random lasers.