FIT-TD Simulation of 2nd Order Instantaneous Non-linear Materials using Iterative Methods

Glahn, T.; Chiavaccini, E.; Schuhmann, R.
October 2011
AIP Conference Proceedings;10/5/2011, Vol. 1398 Issue 1, p135
Conference Proceeding
We present a strategy to perform time domain updates of the electromagnetic fields in instantaneous χ(2) non-linear materials in the finite integration technique (FIT). The extended FDTD-like algorithm introduces an internal inverse material relation to calculate the fields. This relation can be implemented in various ways, enhancing performance and/or accuracy. The resulting algorithms are tested with a numerical example consisting of a periodically poled ridge waveguide, where the second harmonic amplitude is obtained by a modal analysis.


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