Terahertz Quantum Cascade Lasers

This program focuses on the development of novel high-temperature and high-power THz quantum cascade lasers operating in the 1 to 7 THz range. These devices have promising applications in the areas of spectroscopy in chemistry and biology, astrophysics, plasma diagnostics, remote atmospheric sensing and imaging, noninvasive inspection of semiconductor wafers, and free-space communications. Such devices can be compact and enabling. The objectives proposed for Phase II are the theoretical simulation and design of the device structure including injection efficiency and active region design and the growth and fabrication of in-plane prototype lasers to demonstrate the proposed sources. We will also implement newly developed MBE growth technology that improves the performance and yield of quantum cascade lasers.