Browsing by Author "Zheltikov, Aleksei M."
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Item Dispersion-free pulse propagation in a negative-index material(OSA Publishing, 2005) D’Aguanno, Giuseppe; Akozbek, Neset; Mattiucci, Nadia; Scalora, Michael; Bloemer, Mark J.; Zheltikov, Aleksei M.The possibility of controlling the spectral position of the zero group-velocity dispersion point of a negative-index material can be exploited by varying the ratio between the electric and the magnetic plasma frequency to obtain dispersion-free propagation in spectral regions otherwise inaccessible using conventional positive-index materials. Our predictions are confirmed by pulse propagation simulations where all the orders of the complex dispersion of the material are taken into account.Item Generalized Nonlinear Schrödinger Equation for Dispersive Susceptibility and Permeability: Application to Negative Index Materials(American Physical Society (APS), 2005-06-27) Scalora, Michael; Syrchin, Maxim S.; Akozbek, Neset; Poliakov, Evgeni Y.; D’Aguanno, Giuseppe; Mattiucci, Nadia; Bloemer, Mark J.; Zheltikov, Aleksei M.A new generalized nonlinear Schrödinger equation describing the propagation of ultrashort pulses in bulk media exhibiting frequency dependent dielectric susceptibility and magnetic permeability is derived and used to characterize wave propagation in a negative index material. The equation has new features that are distinct from ordinary materials (μ = 1): the linear and nonlinear coefficients can be tailored through the linear properties of the medium to attain any combination of signs unachievable in ordinary matter, with significant potential to realize a wide class of solitary waves.