Simulation of THz Quantum Cascade Lasers
Quantum Cascade Lasers (QCLs) have since their invention in 1994 become a crucial source for mid-infrared and THz radiation. Mid-infrared QCLs have achieved room temperature operation while THz QCLs have not. As such, simulations are an important tool in order to achieve a THz QCL operational at room temperature. This work uses a simulation package based on a nonequilibrium Green’s function model Quantum Cascade Lasers (QCLs) can be designed to emit radiation in the Terahertz (THz) range. For these frequencies, which are faster than electronics and slower than infrared light, there are currently only few devices facing a wide potential of applications. The realization of room temperature operation of THz QCLs would enable practical use in e.g. spectroscopy and public safety. The question i