Piquero Sanz, Gemma MaríaSantarsiero, MassimoGonzález de Sande, Juan CarlosGori, Franco2023-06-202023-06-202012-12-031094-408710.1364/OE.20.027348https://hdl.handle.net/20.500.14352/44016© 2012 Optical Society of America. One of the authors (J. C. G. S.) is grateful to a grant from 2011 Fundación Caja Madrid Program. J. C. G. S. and G. P. acknowledge the hospitality of Prof. F. Gori’s group.The polarization characteristics of unpolarized light passing through a double wedge depolarizer are studied. It is found that the degree of polarization of the radiation propagating after the depolarizer is uniform across transverse planes after the depolarizer, but it changes from one plane to another in a periodic way giving, at different distances, unpolarized, partially polarized, or even perfectly polarized light. An experiment is performed to confirm this result. Measured values of the Stokes parameters and of the degree of polarization are in complete agreement with the theoretical predictions.engjournal articlehttp://dx.doi.org/10.1364/OE.20.027348http://www.opticsinfobase.org/open access535Subwavelength Dielectric GratingsOptically-Active MediaBeamsCoherenceCrystalsPropagationQuartzFieldsÓptica (Física)2209.19 Óptica Física