Use of Ta2O5 biaxial thin film as a high-efficiency polarization converter

被引：8
|
作者：
Lin, Chia-Feng [1 ]
Jen, Yi-Jun [1 ]
机构：
[1] Natl Taipei Univ Technol, Dept Electopt Engn, Taipei 106, Taiwan
来源：
JOURNAL OF NANOPHOTONICS | 2012年 / 6卷
关键词：
oblique angle deposition; biaxial thin film; polarization conversion; BROAD-BAND; CONVERSION; ANGLE; REFLECTION; DEPOSITION; INDEXES; FILTERS; PLATE;
D O I：
10.1117/1.JNP.6.061507
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A columnar Ta2O5 thin film was fabricated with oblique angle deposition and applied in a prism coupling system as a polarization converter. The transmission, reflection and propagation for the wave reflected in one-round trip from the biaxial film were analyzed. Constructive interference occurred for polarization coupling to achieve polarization conversion. Birefringence of the biaxial thin film provided a sophisticated phase compensation as the incident angle varied over a large range to have a wide-angle polarization conversion. For broadband illumination applications, high polarization conversion efficiency was achieved over visible wavelengths. (C) 2012 Society of Photo-Optical Instrumentation Engineers (SPIE). [DOI:10.1117/1.JNP.6.061507]
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页数：9
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