“…In return, laser-matter interaction and laser-based accelerator schemes were successfully tested to generate coherent radiation in the far ends of the electromagnetic spectrum (Murnane et al, 1991;Hamster et al, 1993;Macklin et al, 1993;Schlenvoigt et al, 2008). Latest addition to these studies is the generation of gigawatt (GW) power radiation in the terahertz band of the electromagnetic spectrum by a compact laser-driven accelerator (Gopal et al, 2013b). Laser-driven ion accelerators extend the unique possibility to generate multiple high-power tunable terahertz pulses with variable time delay, which will enable pump-probe studies in materials, otherwise not feasible (Jones et al, 1993;Back et al, 1998;Kampfrath et al, 2013).…”