Research interests
Josh is actively researching many aspects of terahertz technology fundamentals and applications. These include many aspects of quantum cascade laser active region design and the physical dynamics that govern these unipolar semiconductor lasers; the development of high power quantum cascade lasers and high precision control of these lasers; the dynamics of QCLs, studied using ultra-fast THz time-domain spectroscopy techniques to gain a great understanding of the important time scales these device; and phase-locking of QCLs to other terahertz sources.
He is also interested in the applications of THz radiation to science and industry, particularly applications to solid-state materials. He collaborates nationally and internationally on these projects with groups at University of Cambridge, University College London, London Centre for Nanotechnoloy, Delft, Ecole Normale Supérieure Paris, and others.