Abstract
A nearly perfect single crystal DAST thin film has been grown in this study. The polarized optic microscopy photograph demonstrated an ordered morphology for the surface of this thin film. The FTIR spectrum shoed that the intensities of the characteristic absorption bands for the single crystal thin film were different from that for the crystalline thin film. With 3D luminance image analysis, it was found that the intensity of a guided laser light passing through the single crystal thin film along its a-axis is a little bit stronger than that guided along a standard 8.5/125 μm silica optic fiber. The diameter of the guided light and the space between the two guided lights estimated were about 25 μm and 65 μm, respectively. This study indicates that only the single crystal thin film can be used as a waveguide without further process and is a promising candidate for electro-optic modulators and other active optical devices.
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