High refractive index and transparent heavy metal oxide glassy thin films

被引：9
|
作者：
Gonzalo, J [1 ]
Sanz, O
Perea, A
Fernández-Navarro, JM
Afonso, CN
García-López, J
机构：
[1] CSIC, Inst Opt, Serrano 121, E-28006 Madrid, Spain
[2] Ctr Nacl Aceleradores, Seville 41092, Spain
来源：
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2003年 / 76卷 / 06期
关键词：
PACS: 81.15.Fg; 81.05.Kf; 78.66.Jg;
D O I：
10.1007/s00339-002-1918-2
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Heavy metal oxide thin films of the ternary system Nb2O5-GeO2-PbO have been prepared by pulsed laser deposition in an O-2 environment from either glassy or crystalline bulk samples. The range of ([Pb] + [Nb]) content in which the films are optically homogeneous and transparent is much broader (0.5-1.0) than that of the bulk samples considered in the present work (0.55-0.62). The imaginary part of the refractive index is very low in all cases (k < 10(-3)), whereas the real part increases linearly with the ([Pb] + [Nb]) content up to values as high as 2.35. The optical energy gap has been found to be strongly dependent on [Pb], whereas it is almost independent of [Nb]. This dependence is discussed in terms of the role of Pb and Nb as network modifiers or formers.
引用
收藏
页码：943 / 946
页数：4
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