The UWB Coe is actively engaged in modeling and measurement of UWB interactions with nanometer scale particulates, semiconductor and magnetic quantum dots, composites of these particulates and combinations of nano particles - photonic bandgap (PBG) structures and/or plasmonic surfaces/materials. PBG and plasmonic surface are of particular interest since they contain volumes where very large EM fields are localized. The left most simulation visualizes the coupling of an UWB pulse with a fragmented plasmonic surface. The two right movies visualize UWB EM field interactions with two nano particulate composites (one high volume fraction and one low volume fraction). The particulates have Drude like EM properties. Note that high field strengths are indicated in red while low fields are toward the blue. Additional studies are ongoing to predict magnetic domain structures and EM response in magnetic nano dots.