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3 October 2005 Investigation of narrowband THz-generation in a periodically poled material
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This paper presents the theoretical results from semi-analytical and numerical simulations of the THz generation in a two-dimensional geometry in a periodically poled material. The Green's function of a propagating line source is utilized to calculate the field radiated into a homogeneous material and generated by a nonlinear polarization which is confined in one transverse direction. A numerical (FDTD) method is taken for the investigation of the radiation from a material-to-air interface parallel to the direction of propagation of the optical wave. The angular dependence of the radiated transverse electric and magnetic fields is shown and explained for different ratios between the optical pulse width and the walk-off time of optical and THz waves. The numerical results are calculated for lithium niobate, a material known for its good suitability for periodical domain inversion.
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Christian Kolleck "Investigation of narrowband THz-generation in a periodically poled material", Proc. SPIE 5971, Photonic Applications in Nonlinear Optics, Nanophotonics, and Microwave Photonics, 59711X (3 October 2005);

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