外文题目: High-precision measurement of optical constants of ultra-thin coating using surface plasmon resonance spectroscopic ellipsometry in Otto-Bliokh configuration
作者: Hu, Guohang; He, Hongbo; Sytchkova, Anna; Zhao, Jiaoling; Shao, Jianda; Grilli, Marialuisa; Piegari, Angela
刊名: Opt. Express
年: 2017 卷: 25 期: 12 页： 13425--13434
英文关键词:

TOTAL INTERNAL-REFLECTION; WAVELENGTHS; EXCITATION; METALS; FILMS
英文摘要:
In this paper, a surface plasmon resonance (SPR) spectroscopic ellipsometry, based on Otto-Bliokh configuration. is developed for the measurement of thickness and optical constants of ultra-thin coatings. This technique combines sensitivity of surface plasmon with accessibility of optical constants and other advantages of ellipsometry. Surface plasmons (SP) are generated in the sample under test in total reflectance mode and SP geometric distribution over the sample surface is influenced by the coating thickness and optical properties on one hand, and by the air gap thickness on the other hand. Nanoscale control of the thickness of the air gap between a convex surface and the sample was assured using a micron-size beam spot irradiating the contact zone. The amplitude and phase change induced by SPR in the visible and near-infrared spectral range were obtained to determine the dispersion of optical constants and the thickness of the ultra-thin layer. The extracted optical constants were found to be in excellent agreement with the results obtained using TEM and XRR techniques. Both theoretical analysis and experimental results demonstrated high sensitivity and precision of the proposed technique for the analysis of coatings of both metals and dielectrics on metals. (C) 2017 Optical Society or America


文献类型: 期刊论文
正文语种: English
收录类别: SCI
DOI: 10.1364/OE.25.013425


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