Distributed source model for the full-wave electromagnetic simulation of nonlinear terahertz generation

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

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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.

Item Type: Journal Article
Journal or Publication Title: Optics Express
Uncontrolled Keywords: /dk/atira/pure/subjectarea/asjc/3100/3107
Subjects:
Departments: Faculty of Science and Technology > Engineering
ID Code: 76819
Deposited By: ep_importer_pure
Deposited On: 23 Nov 2015 16:34
Refereed?: Yes
Published?: Published
Last Modified: 01 Jan 2020 09:29
URI: https://eprints.lancs.ac.uk/id/eprint/76819

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