title: Analysis of optical waveguide structures by use of a combined finite-difference/finite-difference time-domain method.
abstract: We present a method for full-wave characterization of optical waveguide structures. The method computes mode-propagation constants and cross-sectional field profiles from a straight forward discretization of Maxwell's equations. These modes are directly excited in a three-dimensional finite-difference time-domain simulation to obtain optical field transmission and reflection coefficients for arbitrary waveguide discontinuities. The implementation uses the perfectly-matched-layer technique to absorb both guided modes and radiated fields. A scattered-field formulation is also utilized to allow accurate determination of weak scattered-field strengths. Individual three-dimensional waveguide sections are cascaded by S-parameter analysis. A complete 10(4)-section Bragg resonator is successfully simulated with the method.
authors.affiliation: Department of Electrical and Computer Engineering, Brigham Young University, Provo, Utah 84602, USA. wallacej@ee.byu.edu
authors.forename: Jon W
authors.initials: JW
authors.lastname: Wallace
authors.forename: Michael A
authors.initials: MA
authors.lastname: Jensen