At first, the single-layer Al2O3 and Nb2O5 films were deposited to find their refractive indices. After the indices of the single-layer Al2O3 and Nb2O5 films were measured, the thickness of 1/4 wavelength ([Formula: see text] for each layer of the Al2O3–Nb2O5 bi-layer Bragg reflectors of blue (450-nm) and green (550-nm) lights could be obtained. E-beam was used to deposit the bi-layer Al2O3–Nb2O films (called as one period) with two, four, and six periods on glass substrates to fabricate the Bragg reflectors of blue and green lights. The measured results had proven that the reflectance ratio increased and the bandwidth and full-width at half-depth (FWHD) decreased with the increase of number of periods. The measured results had also proven that as the designed central wavelength increased (changed from blue to green light) and same periods were deposited, the reflectance ratio decreased and the bandwidth and FWHD values increased.

中文翻译：

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Al2O3-Nb2O5 双层布拉格反射器对蓝光和绿光的研究

起初，单层铝2○3和铌2○5沉积薄膜以找到它们的折射率。在单层铝的指数之后2○3和铌2○5测量薄膜，1/4 波长的厚度（[公式：见正文]对于铝的每一层2○3–铌2○5可以获得蓝色（450-nm）和绿色（550-nm）光的双层布拉格反射器。电子束用于沉积双层铝2○3–铌2在玻璃基板上具有两个、四个和六个周期的 O 薄膜（称为一个周期），用于制造蓝光和绿光的布拉格反射器。实测结果表明，随着周期数的增加，反射率增加，带宽和半深度全宽（FWHD）减小。测量结果还证明，随着设计中心波长的增加（从蓝光变为绿光）和相同周期的沉积，反射率降低，带宽和 FWHD 值增加。