Dispersion of the two-photon absorption coefficient in ZnSe

被引：25
|
作者：
Dabbicco, M [1 ]
Brambilla, M [1 ]
机构：
[1] Univ Bari, Dipartmento Fis, INFM, I-70126 Bari, Italy
来源：
SOLID STATE COMMUNICATIONS | 2000年 / 114卷 / 10期
关键词：
semiconductors; optical properties; nonlinear optics;
D O I：
10.1016/S0038-1098(00)00102-2
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
The dispersion of the degenerate two-photon absorption coefficient is measured in ZnSe in the energy region from 2.66 to 3.52 eV, corresponding to 0.5 < hv/E-g < 0.66. Our results clearly show the sizeable contribution of the split-off band to the strength of the nonlinear absorption. By contrasting our measurement with several theoretical calculations, we find that at least the lowest four-bands should be included in the band-structure model of the two-photon absorption. General scaling laws for the calculation of the two-photon absorption coefficient provide a good estimate of the strength of the absorption but fail to account for details of the spectrum. (C) 2000 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码：515 / 519
页数：5
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