Three-dimensional photochemical machining with lasers

Research on the development of new photoinitiator systems for spatially selective photochemical machining with lasers has continued smoothly and is progressing well. The porphyrin system developed during the first quarter continues to look particularly promising. A number of potential new candidate materials have also been identified, including a rubrene sulfonyl chloride derivative. Experimental study of these new compounds was begun during the past quarter and is expected to continue for several more months to define materials properties and optical parameters have been carried out to guide this effort.