A 183-nm-periodic structure including four pairs of Au NPs/SiO2 nanocomposites and SiO2 films was fabricated by repeatedly implanting Au ions into the SiO2 film produced by the radio-frequency magnetron sputtering. Our results reveal that the fabricated periodic structure, although its refractive index variations is only 0.26, can reach a peak reflectivity of 70% at a wavelength of about 550.0 nm. Besides, the peak reflectivity of such structure has been found to be nearly proportional to the number of nanocomposite layers. Our findings could be very helpful to construct small-size but high-efficiency Bragg reflectors in the large-scale photonic integrated circuits.

中文翻译：

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用于制造高效布拉格反射器的周期性交替金属/介电纳米复合材料和介电薄膜：案例研究

通过将 Au 离子重复注入射频磁控溅射产生的 SiO2 薄膜中，制备了包含四对 Au NPs/SiO2 纳米复合材料和 SiO2 薄膜的 183 nm 周期结构。我们的结果表明，所制造的周期性结构虽然其折射率变化仅为 0.26，但在约 550.0 nm 的波长处可以达到 70% 的峰值反射率。此外，已经发现这种结构的峰值反射率几乎与纳米复合材料层的数量成正比。我们的发现对于在大规模光子集成电路中构建小尺寸但高效的布拉格反射器非常有帮助。