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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics

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  • Editors: Andrew Dunn and Anthony Durkin
  • Vol. 7, Iss. 9 — Aug. 28, 2012

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

Christophe Fumeaux, Hungyen Lin, Kazunori Serita, Withawat Withayachumnankul, Thomas Kaufmann, Masayoshi Tonouchi, and Derek Abbott  »View Author Affiliations


Optics Express, Vol. 20, Issue 16, pp. 18397-18414 (2012)
http://dx.doi.org/10.1364/OE.20.018397


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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.

© 2012 OSA

OCIS Codes
(050.1220) Diffraction and gratings : Apertures
(180.4243) Microscopy : Near-field microscopy
(300.6495) Spectroscopy : Spectroscopy, teraherz
(110.6795) Imaging systems : Terahertz imaging

ToC Category:
Physical Optics

History
Original Manuscript: May 31, 2012
Revised Manuscript: July 20, 2012
Manuscript Accepted: July 21, 2012
Published: July 26, 2012

Virtual Issues
Vol. 7, Iss. 9 Virtual Journal for Biomedical Optics

Citation
Christophe Fumeaux, Hungyen Lin, Kazunori Serita, Withawat Withayachumnankul, Thomas Kaufmann, Masayoshi Tonouchi, and Derek Abbott, "Distributed source model for the full-wave electromagnetic simulation of nonlinear terahertz generation," Opt. Express 20, 18397-18414 (2012)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=oe-20-16-18397


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