Finite-Difference Time-Domain NIodelling of Photonic Crystal Structures
نویسندگان
چکیده
Rent5 M. de Ridder and Revco Stoffer' University of Twente. MESA Research Institute, Lightwave Devices Group, P.O. Box 21 7, 7500 AE Enschede, the Nether1,mds Tel. +31 53 489 2712, Fax: +3 / 53 489 3343, E-mail: R.M.de,[email protected] 'Kymata Software, P.O. Box 318, 7500 AH Enschede. the Netherlands ABSTRACT The usual, highly efficient, modelling tools for planar optical devices are generally not suitable for modelling photonic crystal structures. For example, the Beam Propagation Method fails when applied to these strongly scattering structures since presumptions are made on the propagation direction of the waves. The Finite-Difference Time-Domain method (FDTD), however, as a direct discretisation of Maxwell's equations, does not suffer from such restrictive assumptions. I t will be shown that the evolution of the electromagnetic field in both time and space -as calculated using FDTDcan be of considerable help in understanding the physics of photonic crystal structures.
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