1. A terahertz imaging system, comprising a source for generating radiation having one or more frequencies in a range of about 1 THz to about 10 THz, a two-dimensional array of bolometer detector elements suitable for detecting radiation generated by said source, wherein a number of said detector elements in at least one of said dimensions is greater than about 120, and an optical system disposed between said source and said detector array for directing the radiation generated by said source onto said detector array, wherein each of said bolometer detector elements comprises a temperature sensitive element adapted to absorb at least a portion of said radiation generated by the source and convert said absorbed radiation into heat, wherein no antenna is utilized in said bolometer detector elements.