通过软X射线共振反射率测定铝的L（II，III）吸收边处蓝宝石折射率的精细结构。

Fine structures in refractive index of sapphire at the L(II,III) absorption edge of aluminum determined by soft x-ray resonant reflectivity.

作者信息

Das Arijeet, Gupta Rajkumar K, Modi Mohammed H, Mukherjee Chandrachur, Rai Sanjay K, Bose Aniruddha, Ganguli Tapas, Joshi Satish C, Lodha Gyan S, Deb Sudip K

机构信息

Indus Synchrotron Utilization Division, Raja Ramanna Centre for Advanced Technology, Indore, India.

出版信息

Appl Opt. 2012 Oct 20;51(30):7402-10. doi: 10.1364/AO.51.007402.

DOI:10.1364/AO.51.007402

PMID:23089798

Abstract

The optical constants of sapphire crystal (α-Al(2)O(3)) and amorphous Al(2)O(3) in the soft x-ray region (67-85 eV) around the aluminum L absorption edge (73.1 eV) are determined by angle-dependent x-ray reflectivity. The differences between the optical constant values of both the samples are discussed. The fine structures obtained in the absorption of crystalline sapphire are explained. An absorption feature at 70.2 eV is observed for the first time for crystalline alumina. Both datasets are compared to the tabulated values of Henke et al. [At. Data Nucl. Data Tables 54, 181 (1993)], Weaver et al. [Physik Daten, Physics Data: Optical Properties of Metals (Fach-information zentrum, 1981), Vols. 18-1 and 18-2], and [Handbook of Optical Constants of Solids II (Academic, 1991)].

摘要

通过角度相关的X射线反射率测定了蓝宝石晶体（α-Al₂O₃）和非晶态Al₂O₃在铝L吸收边（73.1 eV）附近软X射线区域（67 - 85 eV）的光学常数。讨论了两个样品光学常数的差异。解释了晶体蓝宝石吸收中获得的精细结构。首次观察到晶体氧化铝在70.2 eV处的吸收特征。将这两个数据集与亨克等人[《原子数据与核数据表》54, 181 (1993)]、韦弗等人[《物理数据：金属的光学性质》（ Fach-information zentrum，1981），第18 - 1卷和第18 - 2卷]以及[《固体光学常数手册II》（学术出版社，1991）]中的表格值进行了比较。