4 May 2007 Dispersion effects in light pulses refracted from right- to left-handed media
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Wave fronts of a Gaussian light pulse and a CW Gaussian beam refracted at the boundary of right- and left-handed media are modified due to material dispersion. Group velocity of a negatively refracted pulse is parallel to the direction of energy transport and anti-parallel to phase velocity. Positively refracted group front moves sideways with respect to negatively refracted phase front. We analyze modifications of light pulses of different spectra in effective media with different frequency dispersion curves. Analysis of dispersion effects is important because of possible applications in band separation and pulse compression in metamaterial devices. In 2D FDTD simulations we analyze evolution of CW Gaussian beams and short Gaussian pulses in an effective double negative material with dependence of permittivity and permeability functions on frequency corresponding to Drude material-dispersion model.
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J. Pniewski, J. Pniewski, T. Szoplik, T. Szoplik, M. Scalora, M. Scalora, } "Dispersion effects in light pulses refracted from right- to left-handed media", Proc. SPIE 6581, Metamaterials II, 65810W (4 May 2007); doi: 10.1117/12.724236; https://doi.org/10.1117/12.724236


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