有機微結晶の創製と線形・非線形光学特性 [in Japanese] Fabrication of Organic Microcrystals and Their Linear- and Nonlinear- Optical Properties [in Japanese]
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Reprecipitation method is a convenient technique to fabricate organic microcrystals. The crystal size is usually several tens of nanometer to less than a micrometer. The process of microcrystal formation by this method has been investigated and the mechanism for the microcrystal formation has been established. As a result, a guide line for crystal size control has been proposed, and poly (DCHD) microcrystal as small as 15 nm was prepared successfully. The excitonic absorption peak of microcrystals was blue-shifted with decreasing crystal size. The emission spectrum also changed with crystal size. It was suggested that the abovementioned blue-shift is due to strong coupling between exciton and phonon. Finally, some results with regard to nonlinear optical properties for microcrystals were summarized.
rle 25(11), 765-769, 1997-11-15
The Laser Society of Japan