Numerical study on terahertz random lasing in disordered ruby with three-level atomic system.

Area of Science:

• Quantum Optics
• Condensed Matter Physics
• Terahertz (THz) Science and Technology

Background:

• Terahertz (THz) emission is crucial for various spectroscopic and imaging applications.
• Active disordered media offer unique pathways for light generation and manipulation.
• Ruby's three-level atomic system provides a potential platform for specific optical transitions.

Purpose of the Study:

• To propose a novel scheme for generating terahertz (THz) emission.
• To investigate the feasibility of THz random lasing in an active disordered medium.
• To model the THz emission process using a one-dimensional approach with ruby grains.

Main Methods:

• Development of a one-dimensional theoretical model.
• Simulation of terahertz (THz) emission from ruby grains.
• Utilizing a ruby laser (693.9 nm) to pump the 2Ā level of the ruby's three-level atomic system.

Main Results:

• Demonstrated the potential for terahertz (THz) random lasing phenomenon.
• Identified suitable conditions for achieving THz random lasing.
• Predicted 0.87 THz random lasing on the 2Ā to Ē transition of the split 2E level in ruby.

Conclusions:

• The proposed scheme is a viable method for generating terahertz (THz) radiation.
• Active disordered media, like ruby grains, can support THz random lasing.
• This research opens avenues for developing new THz sources based on solid-state disordered systems.