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Optical waveguiding in epitaxial PbTiO3 thin films

机译:外延PbTiO3薄膜中的光波导

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Epitaxial lead titanate (PbTiO3) thin films on SrTiO3 (100) substrate were grown in situ by radiofrequency sputtering for optical waveguiding applications. The crystalline quality of the PbTiO3 films deposited at 550 degrees C has been investigated through x-ray diffraction analysis. It indicates that thin films are completely c-axis oriented (rocking curve FWHM of 0.2 degrees for the 001 reflection). The transmission spectrum method has been used to measure the dispersion of the refractive index. At 632.8 nm, the PbTiO3 film with an (001) orientation exhibits a refractive index of 2.61, which represents 98% of the bulk material. The prism-coupling technique has been also employed to determine the optical attenuation in the planar waveguide. In this study, we report a low propagation loss of 2.2 +/- 0.2 dB/cm obtained in a PbTiO3 optical waveguide. (C) 1998 Optical Society of America. [References: 20]
机译:通过射频溅射原位生长SrTiO3(100)衬底上的外延钛酸铅(PbTiO3)薄膜,用于光波导应用。通过X射线衍射分析研究了在550℃下沉积的PbTiO3薄膜的晶体质量。这表明薄膜完全是c轴定向的(001反射的摇摆曲线FWHM为0.2度)。透射光谱法已经用于测量折射率的色散。在632.8 nm处,具有(001)取向的PbTiO3薄膜的折射率为2.61,占整体材料的98%。棱镜耦合技术也已被用来确定平面波导中的光衰减。在这项研究中,我们报告了在PbTiO3光波导中获得的2.2 +/- 0.2 dB / cm的低传播损耗。 (C)1998年美国眼镜学会。 [参考:20]

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