Open AccessWollaston prism-like devices based on blazed dielectric subwavelength gratings
Author(s) -
Riad Haïdar,
Grégory Vincent,
Nicolas Guérineau,
Stéphane Collin,
Sabrina Velghe,
Jérôme Primot
Publication year - 2005
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/opex.13.009941
Subject(s) - optics , grating , dielectric , materials science , refractive index , polarization (electrochemistry) , prism , diffraction grating , planar , extinction ratio , gallium arsenide , optoelectronics , physics , wavelength , chemistry , computer graphics (images) , computer science
A Wollaston prism-like binary dielectric grating is presented and analyzed. It behaves like a transmission grating, differentially and symmetrically blazed for the two crossed polarization states, TE and TM. The phase profile is obtained by means of subwavelength structures etched in a high optical index isotropic dielectric medium (gallium arsenide, for instance). The performance of the device is illustrated by numerical examples and sketched in terms of spectral bandwidth and of extinction ratio. Some practical issues related to the fabrication are discussed.