He is also interested in the applications of THz radiation to science and industry, particularly applications to solid-state materials. 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. Josh is actively researching many aspects of terahertz technology fundamentals and applications. This is a structured five year fellowship development programme leading to an Associate Professor role. In April 2016, he was awarded a ‘University Academic Fellowship’ at the University of Leeds. After this he returned to the UK to take up a post-doctoral research fellowship at the University of Leeds working on coherent detection of THz QCLs operating in ‘continuous-wave’.
The fellowship proposal centred on the modelocking of QCLs and their coherent detection. In 2011 won an individual intra-European fellowship and took up the Marie Curie position at the Ecole Normale Supérieure in Paris. During this time, he continued to pursue the research themes of his PhD, designing, fabricating and studying broadband active regions in THz QCLs. The main focus of his PhD was on the design, fabrication and characterisation of heterogeneous active regions in THz quantum cascade lasers (QCLs).Īfter completing his PhD, he started a post-doctoral Fellowship in the Cavendish Laboratory with the support of a departmental PhD-Plus award. He then moved to the University of Cambridge where he studied for a PhD in the Semiconductor Physics Group of the Cavendish Laboratory.
Joshua Freeman completed an MPhys 4-year degree in Physics at the University of Oxford.
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