A polarizer that uses the combined effects of birefringence and diffraction has been realized experimentally. A sheet of calcite was taken as the substrate, and a series of grooves with a sawtooth profile was manufactured on its surface by optical grinding and polishing. The sample polarizer shows good polarizing performance in test. The measured extinction ratio is better than 2 × 10-4 and can be improved further.
© 1997 Optical Society of America
S. Q. Liu, Y. S. Chen, N. J. Wu, and A. Ignatiev, "Realization of a polarizer employing the combined effects of birefringence and diffraction," Opt. Lett. 22, 1518-1520 (1997)