| Abstract 摘要 | In this talk, I focus on the study of dielectric polarization of organic layers by optical second harmonic generation (SHG) measurement. There are two kinds of SHG. One is electric field induced optical second harmonic generation called EFISHG, which is activated in the presence of electrostatic field, and the other is the general optical second harmonic generation (SHG) that are generally generated from molecular non-symetric molecular systems. Consequently, the former one is available for directly probing carrier motions in organic layers. In this presentation, I demonstrate anisotropic carrier motion visualized in spin-coated films by the EFISHG, and discuss how carrier motion is modeled based on the visualized SHG images. The latter one is available for characterizing structure of molecular systems. In this presentation I show visualized dielectric polarization images in monolayer domains on the air/water surface by using the SHG, and then discuss the difference of polarization images visualized by BAM method. |
