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Special Section on Nanostructured Thin Films: From Theoretical Aspects to Practical Applications

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

[+] Author Affiliations
Chia-Feng Lin, Yi-Jun Jen

National Taipei University of Technology, Department of Electro-Optical Engineering, No. 1, Sec. 3, Chung-Hsiao E. Rd., Taipei 106, Taiwan

J. Nanophoton. 6(1), 061507 (May 31, 2012). doi:10.1117/1.JNP.6.061507
History: Received November 2, 2011; Revised April 23, 2012; Accepted April 27, 2012
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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.

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© 2012 Society of Photo-Optical Instrumentation Engineers

Citation

Chia-Feng Lin and Yi-Jun Jen
"Use of Ta2O5 biaxial thin film as a high-efficiency polarization converter", J. Nanophoton. 6(1), 061507 (May 31, 2012). ; http://dx.doi.org/10.1117/1.JNP.6.061507


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