Giant nonlinear absorption in the NiO antiferromagnet

被引：0
|
作者：
S. I. Shablaev
R. V. Pisarev
机构：
[1] Russian Academy of Sciences,Ioffe Physicotechnical Institute
来源：
Physics of the Solid State | 2003年 / 45卷
关键词：
Spectroscopy; State Physics; Conduction Band; Spectral Feature; Energy Region;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
A study of the spectrum of nonlinear two-photon and two-step absorption in NiO single crystals, carried out in the energy region ℏω1 + ℏω2 = 2.45–4.575 eV, showed it to have a complex shape and consist of very strong peaks (from 0.05 to 2.7 cm/MW). Within the energy interval 2.45–3.3 eV, the spectrum is due to d-d transitions in the Ni2+ ion. The band gap width was determined to be Eg=3.466 eV. The spectral features seen above this energy originate from interband transitions from three valence subbands to the conduction band bottom.
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页码：1742 / 1745
页数：3
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