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We have investigated the two-photon and

New Macromolecular Optical Limiting Material Theodore G. Goodson III, University of Michigan Ann Arbor, DMR 0802968. Glowing 20 m – thick sample possessing strong TPA as well as extremely bright TPA-excited fluorescence. We have investigated the two-photon and

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We have investigated the two-photon and

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  1. New Macromolecular Optical Limiting Material Theodore G. Goodson III, University of Michigan Ann Arbor, DMR 0802968 Glowing 20m – thick sample possessing strong TPA as well as extremely bright TPA-excited fluorescence • We have investigated the two-photon and • optical limiting properties of a new organic ring-shaped macromolecule. • The optical limiting response is very impressive and we can obtain very high concentrations with minimal aggregation with these cyclic systems. • An enhancement in the two-photon cross-section as the ring cycle increased was observed. • In our experiments the very small optical path lengths combined with the very strong TPA of these materials suggests that later capillary applications might result in ever more promising effects for real optical limiting devices. • New synthetic procedures are underway to develop better cyclic structures with thiophene and stilbene repeat units. • . Goodson III, T.; et. al. J. Am. Chem. Soc. 2008, 130, 3252-3253.

  2. New Macromolecular Optical Limiting Material Theodore G. Goodson III, University of Michigan Ann Arbor, DMR 0802968 EDUCATIONAL • The annual Summer Research Opportunity Program (SROP) conference was co-chaired by the PI. The SROP program offers students first-hand exposure to graduate study and faculty life through mentor-guided research. • Participants work under faculty mentorship either on an individual basis or as part of a research team. • More than 450 students participated in the conference this year from universities in the Big Ten. • This year’s conference program features a renewed emphasis on research and academic preparation.  • The invited speakers (Marye Anne Fox and Freeman Hrabowski) were chosen with this emphasis. • The participants were mainly only rising juniors and seniors as this conference was designed to encourage an increased interaction in workshops.  • The format focused on the Poster Presentation, Research Roundtables and Workshops. http://www.rackham.umich.edu/sropconference/

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