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.
© 2005 Optical Society of America
Giuseppe D'Aguanno, Neset Akozbek, Nadia Mattiucci, Michael Scalora, Mark J. Bloemer, and Aleksei M. Zheltikov, "Dispersion-free pulse propagation in a negative-index material," Opt. Lett. 30, 1998-2000 (2005)