Organic Ultrafast Nonlinear Optical Devices Characterization of Organic Photonic Materials
Final rept. 1 Mar 97-28 Feb 98
CITY COLL RESEARCH FOUNDATION NEW YORK
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We have purchased and installed a new tunable femtosecond 150 fs laser system dedicated to nonlinear optical characterization of organic materials. We have conducted the first nonlinear optical measurements of a thin film endohedral metallofullerene, Gd2C80 using the new system. Single beam z scan experiments were carried out to measure the size and the sign of the third order susceptibility at 400nm, 590nm, 648nm, 800nm, and 1000nm. At 800nm measurements were conducted for different pulse duration between 130 fs and 1 ps. We found that, when wavelength and pulse duration are taken into account, the third order susceptibility of Gd2C80 is about one order of magnitude larger then that of empty-cage C60 or C70. The research has provided practical and theoretical training in high power laser technology, nonlinear optics, crystallography, and spectroscopy to three graduate and two undergraduate students.
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