Polarization conversion by dielectric subwavelength gratings in conical mounting

Abstract

Subwavelength dielectric gratings are examined in total-internal-reflection configuration. It is demonstrated experimentally that such elements, fabricated in TiO2, can perform full polarization conversion from incident TE to TM with nearly 100% efficiency. The dependence of the polarization conversion on the angle of incidence is analyzed. Rigorous diffraction theory is used to cross check the experimental results.

Keywords

• diffraction gratings
• polarization
• form birefringence