| Issue |
J. Eur. Opt. Soc.-Rapid Publ.
Volume 6, 2011
|
|
|---|---|---|
| Article Number | 11041 | |
| Number of page(s) | 7 | |
| DOI | https://doi.org/10.2971/jeos.2011.11041 | |
| Published online | 24 August 2011 | |
Regular papers
Discontinuous space variant sub-wavelength structures for generating radially polarized light in visible region
1
Institute for Optics, Information and Photonics, Friedrich-Alexander-University Erlangen-Nuremberg, Staudtstr. 7/B2, D-91058 Erlangen, Germany
2
Max-Planck Institute for the Science of Light, Guenther-Scharowsky-Str. 1/Bau 24, D-91058 Erlangen, Germany
* Zahra.Ghadyani@physik.uni-erlangen.de
Received:
1
June
2011
A discontinuous space variant sub-wavelength dielectric grating is designed and fabricated for generating radially polarized light in visible region (λ = 632.8 nm). The design is based on sub-wavelength silicon nitride structures introducing a retardation of π/2 by form birefringence, with space variant orientation of the optical axis. The pattern is divided into concentric ring segments with constant structural parameters, therefore reducing electron-beam writing time significantly. The design avoids the technological challenges encountered in the generation of a continuous space variant grating while maintaining good quality of the resulting polarization mode.
Key words: nonlinear optics / nonlinear slow-mode waveguides / stimulated Raman scattering / self-phase modulation / Silicon Raman amplifier
© The Author(s) 2011. All rights reserved.
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