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1 . T itle : Metal nano-cluster composites (MNCC) as optical materials

SEMINAR. 1 . T itle : Metal nano-cluster composites (MNCC) as optical materials 2. S peaker : Dr. Won Mok Kim (KIST) 3. T ime : 1 6 :00 – 17:30, Thursday, April 5, 2007 4. P lace : e+ Lecture Hall (room 83188), 2 nd Research Building, Sungkyunkwan University 5. Summary :

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1 . T itle : Metal nano-cluster composites (MNCC) as optical materials

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  1. SEMINAR 1. Title :Metal nano-cluster composites (MNCC) as optical materials 2. Speaker : Dr. Won Mok Kim (KIST) 3. Time : 16:00 – 17:30, Thursday, April 5, 2007 4. Place : e+ Lecture Hall (room 83188), 2nd Research Building, Sungkyunkwan University 5. Summary : Nanocomposite thin films consisting of metal nano-cluster inclusions embedded in a transparent dielectric matrix have been receiving considerable attention as a promising candidate for future all-optical photonic devices due to their interesting optical properties, large 3rd order optical nonlinearity and fast response time. Unlike in the bulk metal, the conduction electrons confined in a metal particle behave like a polarizing dipole exhibiting a nonzero 3rd order optical susceptibility when an electric field is applied. A strong local field enhancement arises from the dielectric confinement effectand shows a maximum at so called surface plasmon resonance (SPR) frequency. At SPR, the quantized collective motion of the confined free electrons is resonantly-coupled to the incident optical field, yielding a characteristic absorption band near which very large effective 3rd order optical nonlinear properties are observed. In this presentation, linear and nonlinear optical characteristics and commonly adopted fabrication techniques of metal nano-cluster composites (MNCC), and possible applications of MNCC for future optical devices are discussed. 6 Background : Education 1982 Metallurgical Engineering, Seoul National University, B.S 1986 Materials Science and Engineering, University of Kentucky, M.S 1990 Materials Science and Engineering, University of Kentucky, Ph.D Work Experience 1990-1992 Post doctoral scholar & lecturer, Materials Science and Engineering, University of Kentucky 1992- Materials design lab. Korea Institute of Science and Technology (KIST) - Rewritable optical memory materials - Design and characterization of optical thin films - Transparent conducting oxide thin films Sungkyunkwan University

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