The deexcitation of guided modes in a thin-film planar dielectric waveguide is considered. On the film–cover interface is etched an ordinary diffraction grating whose wave number is such that one radiation beam in the substrate alone is generated. For a specified radiation direction the p-polarized radiation vanishes selectively. This phenomenon is used in the development of a polarizer whose output is predominantly in the p polarization. The sensitivity of the performance of the polarizer to small deviations in the design parameters is also investigated.
© 1994 Optical Society of America
Original Manuscript: October 13, 1993
Published: April 1, 1994
Daniel W. C. So and S. R. Seshadri, "Thin-film grating polarizer," Opt. Lett. 19, 469-471 (1994)