Optical Properties in Mid-Infrared Range of Silicon Oxide Thin Films with Different Stoichiometries

被引:16
作者
Herguedas, Natalia [1 ]
Carretero, Enrique [1 ]
机构
[1] Univ Zaragoza, Dept Fis Aplicada, C Pedro Cerbuna 12, Zaragoza 50009, Spain
关键词
thin film; optical properties; mid-infrared; silicon oxide; refractive index; PERFECT ANTIREFLECTION COATINGS; DIELECTRIC FUNCTION; ZINC-OXIDE; MAGNETRON; DEPOSITION; SPECTROSCOPY; NITRIDE; DIOXIDE; MODEL; SIOX;
D O I
10.3390/nano13202749
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
SiOx thin films were prepared using magnetron sputtering with different O2 flow rates on a silicon substrate. The samples were characterized using Fourier transform infrared spectroscopy in transmission and reflection, covering a spectral range of 5 to 25 mu m. By employing a multilayer model, the values of the complex refractive index that best fit the experimental transmission and reflection results were optimized using the Brendel-Bormann oscillator model. The results demonstrate the significance of selecting an appropriate range of O2 flow rates to modify the SiOx stoichiometry, as well as how the refractive index values can be altered between those of Si and SiO2 in the mid-infrared range.
引用
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页数:12
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