title: Optical electromagnetic vector-field modeling for the accurate analysis of finite diffractive structures of high complexity.
abstract: 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.
authors.affiliation: Department of Electromagnetic Systems, Technical University of Denmark, Building 348, DK-2800 Lyngby, Denmark. kd@emi.dtu.dk
authors.forename: K H
authors.initials: KH
authors.lastname: Dridi
authors.forename: A
authors.initials: A
authors.lastname: Bjarklev