Fumeaux, Christophe and Lin, Hungyen and Serita, Kazunori and Withayachumnankul, W. and Kaufmann, Thomas and Tonouchi, Masayoshi and Abbott, Derek (2012) Distributed source model for the full-wave electromagnetic simulation of nonlinear terahertz generation. Optics Express, 20 (16). pp. 18397-18414. ISSN 1094-4087
Full text not available from this repository.Abstract
The process of terahertz generation through optical rectification in a nonlinear crystal is modeled using discretized equivalent current sources. The equivalent terahertz sources are distributed in the active volume and computed based on a separately modeled near-infrared pump beam. This approach can be used to define an appropriate excitation for full-wave electromagnetic numerical simulations of the generated terahertz radiation. This enables predictive modeling of the near-field interactions of the terahertz beam with micro-structured samples, e.g. in a near-field time-resolved microscopy system. The distributed source model is described in detail, and an implementation in a particular full-wave simulation tool is presented. The numerical results are then validated through a series of measurements on square apertures. The general principle can be applied to other nonlinear processes with possible implementation in any full-wave numerical electromagnetic solver.