光学学报, 2020, 40 (19): 1931002, 网络出版: 2020-09-19
蓝宝石衬底多层AlGaN薄膜透射谱研究 下载: 922次
Transmission Spectrum of Multilayer AlGaN Thin Film on Sapphire Substrate
薄膜 AlGaN 全组分 光学性质 多层薄膜模型 透射谱拟合 thin films AlGaN full composition optical properties multilayer thin film model transmission spectral fitting
摘要
全组分AlGaN是指Al组分(原子数分数)在0~1之间的AlGaN。通过将组分引入到AlGaN的复折射率中,在200~800 nm光谱范围内建立了全组分AlGaN复折射率公式。通过椭圆偏振法获得了蓝宝石的光学参数,并利用透射谱进行了验证。利用上述复折射率公式和多层光学薄膜模型研究了蓝宝石衬底多层AlGaN薄膜样品的透射谱,分析了各层薄膜对样品透射谱的影响以及工艺可能造成的实际结构的偏移,提出了一种多层薄膜透射谱的快速分析法。
Abstract
Full composition range AlGaN refers to AlGaN with an Al composition of 0-1. In this paper, the composition is introduced into the complex refractive index of AlGaN, and a complex refractive index formula for full composition AlGaN is established in the spectral range of 200-800 nm. The optical parameters of sapphire are obtained by ellipsometry and verified by the transmission spectrum. The complex refractive index formula and the multilayer optical film filter model are used to study the transmission spectra of the multilayer AlGaN samples on sapphire substrates. The effect of each film on the transmission spectra of samples and the possible shift of an actual structure caused by the process are analyzed, and a fast analysis method is thus proposed for the transmission spectra of multilayer films.
李浩杰, 张燕. 蓝宝石衬底多层AlGaN薄膜透射谱研究[J]. 光学学报, 2020, 40(19): 1931002. Haojie Li, Yan Zhang. Transmission Spectrum of Multilayer AlGaN Thin Film on Sapphire Substrate[J]. Acta Optica Sinica, 2020, 40(19): 1931002.