An electromagnetic vector-field model for design of optical components based on the finite-difference time-domain method and radiation integrals is presented. Its ability to predict the optical electromagnetic dynamics in structures with complex material distributions is demonstrated. Theoretical and numerical investigations of finite-length surface-relief structures embedded in polymer dielectric waveguiding materials are presented. The importance of several geometric parameter dependencies is indicated as far-field power distributions are rearranged between diffraction orders. The influences of the variation in grating period, modulation depth, length, and profile are investigated.
© 1999 Optical Society of America
(050.1940) Diffraction and gratings : Diffraction
(130.3120) Integrated optics : Integrated optics devices
(260.1960) Physical optics : Diffraction theory
(260.2110) Physical optics : Electromagnetic optics
Kim H. Dridi and Anders Bjarklev, "Optical Electromagnetic Vector-Field Modeling for the Accurate Analysis of Finite Diffractive Structures of High Complexity," Appl. Opt. 38, 1668-1676 (1999)