Analysis of High-Performing Terahertz Quantum Cascade Lasers

This is the authors' abstract. We don't add key points for this paper.

Quantum cascade lasers operating at THz frequencies can fill the gap between conventional electronic and optical devices, but still need substantial cooling. The authors conduct a detailed analysis of today's high-performing devices using nonequilibrium Green's function method, and identify the shortcomings of these devices. They also demonstrate a convenient way to study the current injection, which is a limiting factor of the device's performance. These approaches lead to the suggestion and design of an improved device that operates at 265 K, which requires less cooling.