Light patterns can be manipulated on the nanoscale by precise configuration of surface plasmon polaritons, resulting in such phenomena as nanoscale focusing and negative refractions. Focused ion beam milling can be used to impress various nanohole array patterns into traditional plasmonic materials such as Ag and Au to synthesize crystals with unique plasmonic properties. Modification of these arrays, either by reconfiguring spacing patterns or altering the fundamental unit cell shape (for example, circular holes versus square impressions) will affect the transmission and absorption patterns of the plasmonic material. Such precise transmission of light on a nanoscopic scale allows for the creation of molecular sensors that remain stable at very high frequencies. Configuration of surface plasmons in this manner has been used in the past to enhance the emission efficiency of organic light emitting diodes and similar simple electronic devices. This experiment will examine refraction patterns of various nanohole arrays, using Ag as a plasmonic material, as well as plasmonic focusing of light to confined, nanoscale dimensions, in order to evaluate the viability of plasmonic materials as a potential medium for data transfer.