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Highly transparent ZnO thin films were deposited at different substrate temperatures by pulsed laser deposition in an oxygen atmosphere.The thin films were characterized by various techniques including X-ray diffraction,scanning electron microscopy,optical absorption,and photoluminescence.We demonstrated that oriented wurtzite ZnO thin films could be deposited at room temperature using a high purity zinc target.Variable temperature photoluminescence revealed new characteristics in the band edge emission.The... 相似文献
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从理论上分析了利用时间有限差分法由近场到近场或远场转换的频域和时域两种方法,并选择时域的方法计算在FDTD计算范围内一给定点的电场值,与直接利用FDTD法得到的结果相比较,两者非常一致;最后利用该方法计算了功率变换器FDTD计算范围外一给定点的电磁场时间响应. 相似文献
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