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Journal of Nanophotonics

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

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.

Paper Details

Date Published: 31 May 2012
PDF: 10 pages
J. Nanophoton. 6(1) 061507 doi: 10.1117/1.JNP.6.061507
Published in: Journal of Nanophotonics Volume 6, Issue 1
Show Author Affiliations
Chia-Feng Lin, National Taipei Univ. of Technology (Taiwan)
Yi-Jun Jen, National Taipei Univ. of Technology (Taiwan)

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