Encapsulation process for diffraction gratings

被引：12
作者：
Ratzsch, Stephan [1 ]
Kley, Ernst-Bernhard [1 ]
Tuennermann, Andreas [1 ,2 ]
Szeghalmi, Adriana [1 ]
机构：
[1] Univ Jena, Abbe Ctr Photon, Inst Appl Phys, D-07743 Jena, Germany
[2] Fraunhofer Inst Angew Opt & Feinmech, D-07745 Jena, Germany
来源：
OPTICS EXPRESS | 2015年 / 23卷 / 14期
关键词：
WIRE GRID POLARIZER; TRANSMISSION GRATINGS; FUSED-SILICA; ALUMINUM-OXIDE; REPLICATION; EFFICIENCY; ARRAYS; ACID;
D O I：
10.1364/OE.23.017955
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Encapsulation of grating structures facilitates an improvement of the optical functionality and/or adds mechanical stability to the fragile structure. Here, we introduce novel encapsulation process of nanoscale patterns based on atomic layer deposition and micro structuring. The overall size of the encapsulated structured surface area is only restricted by the size of the available microstructuring and coating devices; thus, overcoming inherent limitations of existing bonding processes concerning cleanliness, roughness, and curvature of the components. Finally, the process is demonstrated for a transmission grating. The encapsulated grating has 97.5% transmission efficiency in the -1st diffraction order for TM-polarized light, and is being limited by the experimental grating parameters as confirmed by rigorous coupled wave analysis. (C) 2015 Optical Society of America
引用
收藏
页码：17955 / 17965
页数：11
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