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Larry Dalton (University of Washington) DMR- 0092380

Organic Electroactive Materials. Larry Dalton (University of Washington) DMR- 0092380. Loading Parameter = EO Coefficient ÷( molecular hyper- polarizability)(constant).

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Larry Dalton (University of Washington) DMR- 0092380

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  1. Organic Electroactive Materials Larry Dalton (University of Washington)DMR-0092380 Loading Parameter = EO Coefficient÷(molecular hyper- polarizability)(constant) Quantum mechanics [J. Am. Chem. Soc., 127, 2758 (2005)] and new statistical mechanical methods (Fig. 1) have been used to achieve record electro-optic (EO) activity (12 times the commercial standard lithium niobate). Pseudo-atomistic Monte Carlo calculations have been used to achieve a quantitative understanding of the effect of intermolecular electrostatic interactions on acentric chromophore order under the influence of an electric poling field. Theoretically-inspired crosslinked dendrimer materials have been prepared that not only display record electro-optic activity but also exhibit high thermal and photochemical stability and low waveguide loss. A variety of prototype devices have been fabricated including hybrid organic EO/silicon photonic split ring microresonators relevant to wavelength division and reconfigurable optical add/drop multiplexing. High bandwidth optical rectification has been observed. Fig. 1. The theoretically-predicted variation of the product of chromophore number density and acentric order parameter ( EO activity) vs. number density is shown as a function of chromophore shape.

  2. Organic Electroactive MaterialsLarry Dalton (University of Washington)DMR-0092380 • Outreach • Chairman, Advisory Board, Center for Research and Education in Advanced Materials, Norfolk State University; worked with NSU to develop its first Ph.D. program in science and engineering. Participated in course and curriculum developed and lectured in a prototype core course for the new Ph.D. program (Spring 2005). • Worked with Alabama A&M and other HBCUs on development of research and educational activities including activities sponsored by NSF and NASA. • Mentored six Seattle area high school students two of which are pursuing science majors at Stanford Univ. this Fall. • Lectured at the Seattle Technology Alliance, the Seattle Community Development Roundtable, and Washington and California Rotary Clubs. Education: Educational activities related to this program include lectures at the NSF-sponsored workshop on sensor science & technology at Alabama A&M, the NASA Space Grant REU program at UW, the Frontiers in Nanotechology course (a core course in the Nanotechnology Ph.D. program) at UW, a tutorial at the AAAS 2004 annual meeting, NSF REU lectures at UW, and lectures in a prototype course for the proposed Ph.D. program in Advanced Materials Science & Engineering at Norfolk State University. Prof. Dalton at Norfolk State University (receives QEM/ MSE 2005 Giant In Science Award)

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