An extruded polycarbonate article suitable as an energy absorber is disclosed. An excitation beam scans an array of biological materials, and the emission signal detector detects an emission signal indicative of an emission beam responsive to the excitation beam. The electromagnetic wave can propagate longitudinally along the surface of the transmission medium and at least partially around the surface of the transmission medium. In response to one of the logical partitions needing to access a storage drive, the logical partition transmits a seed to the storage drive.