One- and two-photon absorption in transition metal oxide glasses

被引:24
作者
El-Diasty, Fouad [1 ]
Abdel-Baki, Manal [2 ]
机构
[1] Ain Shams Univ, Dept Phys, Fac Sci, Cairo 11566, Egypt
[2] Natl Res Ctr, Dept Glass, Cairo 12311, Egypt
关键词
absorption coefficients; aluminium compounds; barium compounds; bismuth compounds; bond lengths; borate glasses; chromium compounds; energy gap; glass; lithium compounds; magnesium compounds; polarisability; silicon compounds; sodium compounds; titanium compounds; two-photon processes; NONLINEAR-OPTICAL-PROPERTIES; EDGE; DEPENDENCE; DISPERSION; SILICATE;
D O I
10.1063/1.3213378
中图分类号
O59 [应用物理学];
学科分类号
摘要
Scaling of nonlinear two-photon absorption to optical bandgap (which describes the electronic structure of material) in transition metal glasses is given through a proposed empirical equation. A wide applicability of the relation is proven through the 21 studied glasses. The relationship between the calculated nonlinear absorption coefficient and the measured bandgap energy using Tauc's parabolic band model is discussed in terms of electronic structure of constituent oxides, ionic polarizability, hyperpolarizability of cations, nonbridging oxygen bonds, and the cationic bond-length approach.
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页数:4
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