hello. I'm studying a project on Thz radiation and have to establish what material would make a good THz detector. To this end I've tried to find equations linking the aborption of THz radiation in matter and how the absorption varies with wavelength (one of the things I'd like to eastablish is how thick I need to make my detector to get 100% absorption of the THz radiation). Anyway up until this point I have been unable to come across any such equations.....seriously frustrating (perhaps I need to refine how I search for informartion). Could anyone help me out? Many thanks!