Strategies for in-situ thin film filter monitoring with a broadband spectrometer

被引:1
|
作者
Zideluns, Janis [1 ]
Lemarchand, Fabien [1 ]
Arhilger, Detlef [2 ]
Hagedorn, Arro [2 ]
Lumeau, Julien [1 ]
机构
[1] Aix Marseille Univ, Inst Fresnel, CNRS, Cent Marseille, F-13013 Marseille, France
[2] Buhler Leybold Opt, Alzenau, Germany
基金
欧盟地平线“2020”;
关键词
DEPOSITION;
D O I
10.1364/OE.484333
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Optical monitoring of thin film interference filters is of primary importance for two main reasons: possible error compensation and greater thickness accuracy of the deposited layers compared to non-optical methods. For many designs, the latter reason is the most crucial, because for complex designs with a large number of layers, several witness glasses are used for monitoring and error compensation with a classical monitoring approach is no longer possible for the whole filter. One optical monitoring technique that seems to maintain some form of error compensation, even when changing witness glass, is broadband optical monitoring, as it is possible to record the determined thicknesses as the layers are deposited and re-refine the target curves for remaining layers or recalculate the thicknesses of remaining layers. In addition, this method, if used properly, can, in some cases, provide greater accuracy for the thickness of deposited layers than monochromatic monitoring. In this paper, we discuss the process of determining a strategy for broadband monitoring with the goal of minimizing thickness errors for each layer of a given thin film design.
引用
收藏
页码:9339 / 9349
页数:11
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