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Seminar Abstract
November 5, 2003:
"Development and Characterization
of Optical Limiting Materials"
Professor Wenfang Sun
Department of Chemistry
North Dakota State University
In the past few decades, with the development of laser and other
high-intensity light sources, there has been a growing need for passive
optical limiters to protect human eyes and optical sensors. This has
generated great interest in the development of optical limiting materials
and devices. To date, a variety of organic and inorganic materials
have been investigated for this application. Among these materials,
metallo-organic complexes are particular attractive because the existence
of delocalized pi-electrons within the conjugate ligand can lead to large
nonlinearity and the possible metal-to-ligand or ligand-to-metal charge
transfer may further enhance their nonlinearity.
In this seminar, the basic concepts of optical limiting, the current
material development, and nonlinear optical characterization techniques
will be briefly reviewed. The third-order nonlinearities and optical
limiting performances of two metal-organic systems and one organic system
will be discussed.
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