A radiation-sensitive detector array (100) including a first side (120), a second side (110) in opposed relation to the first side, and a detector substrate (130) positioned between the first and second sides is presented. The first side is constructed as a non-planar or uneven shape. The first side is a cathode and the second side is an anode. The cathode may be a field emission cathode (FEC) and the detector substrate may be a Cadmium Zinc Telluride (CZT) detector substrate. The non-planar or uneven shape may be a series of equally spaced apart protrusions, each of the protrusions being a pyramidal construction including a peak, the peak adapted and dimensioned to cause electric field lines to focus or converge thereon.