Instrumentation, Techniques, and Measurement

Near ultraviolet-visible radial wire grid polarizer for tight focusing applications

[+] Author Affiliations
Katsiaryna Ushakova, Alberto da Costa Assafrao, Silvania F. Pereira, H. Paul Urbach

Delft University of Technology, Faculty of Applied Sciences, Department of Imaging Physics, Optics Research Group, Van der Waalsweg 8, Delft 2628CH, The Netherlands

Opt. Eng. 54(10), 104101 (Oct 06, 2015). doi:10.1117/1.OE.54.10.104101
History: Received June 24, 2015; Accepted August 31, 2015
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Abstract.  A circular wire grid polarizer (WGP) as a device to produce high quality radially polarized light at near UV wavelength range (in particular at the wavelength of λ=405nm) is presented starting from design modeling followed by fabrication and performance analysis. The wire grid consists of concentric subwavelength metallic cylinders covering a high quality glass substrate and fabricated using an electron beam pattern generator and etching techniques. The theoretical modeling using the rigorous finite-element method and measurements of the transmitted light through the mask have been evaluated. An analysis on adjustments of the geometry of the WGP to produce the optimum focused spot of the longitudinal component of the electric field, its implementation, and qualitative testing are also presented.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Katsiaryna Ushakova ; Alberto da Costa Assafrao ; Silvania F. Pereira and H. Paul Urbach
"Near ultraviolet-visible radial wire grid polarizer for tight focusing applications", Opt. Eng. 54(10), 104101 (Oct 06, 2015). ; http://dx.doi.org/10.1117/1.OE.54.10.104101


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