New THz and Far-infrared Lightsources

There is a grow­ing in­ter­est in THz and far in­frared light sources for use in ma­te­r­ial stud­ies. Both co­her­ent ra­dia­tive sources (CSR, COTR, etc.) and FEL sources have been de­vel­oped in the last few years to ad­dress this need. This talk will de­scribe re­cent de­vel­op­ments in this grow­ing field.