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The influences of geometrical parameters of groove on the polarization transformation of BSW. (a) the polarization transformation intensity Rsp, and (b) the scattering loss of TE0-BSW as a function of incidence angle and the depth of groove. The width of groove is fixed at 400 nm. As the depth of groove is fixed at 150 nm, (c) the polarization transformation intensity Rsp, and (d) the scattering loss of TE0-BSW as a function of incidence angle and the width of groove.
