Highly efficient polarization separation requires very high aspect ratio gratings. The simplified modal method allows compromises between height and efficiency. Lower aspect ratio gratings are designed for 633nm and fabricated by e-beam lithography.
© 2012 OSA
G. Sridharan, P. V, and S. Bhattacharya, "Design and Fabrication of Lower Aspect Ratio Sub-wavelength Grating for Polarization Separation," in International Conference on Fibre Optics and Photonics, OSA Technical Digest (online) (Optical Society of America, 2012), paper MPo.14.
References are not available for this paper.