A general theory is presented to describe the effects of dispersion fluctuations on optical pulses propagating inside single-mode fibers modeled as a linear dispersive medium. It is shown that the pulse broadening induced by dispersion fluctuations can be quite large in dispersion-managed lightwave systems, especially at high bit rates, and can exceed that induced by third-order dispersion and ...

A polarized maser is assumed to operate in an anisotropic medium with natural modes polarized differently to the maser. It is shown that when the spatial growth rate and the generalized Faraday rotation rate are comparable, the polarization of the growing radiation is different from those of the maser and medium. In particular, for a lineary polarized maser operating in a medium with linearly p...

We have studied the induced polarization (IP) response of multiphase porous systems by conducting complex resistivity (CR) frequency-domain IP measurements for sands and sandstones samples containing salt water in pores and those whose unsaturated pores were filled with synthetic oil. The results of our study show that the oil saturated sands and sandstone samples are characterized by a signifi...

2014 Bulk CdSe and microcrystallites of CdSexS1-x embedded in a glass matrix are studied using femtosecond laser techniques. The ultrafast dynamics of the photogenerated carriers are measured. Spectral hole burning due to creation of a non-thermal carrier population is observed in both types of materials. The carrier recombination lifetime is measured. Coherent interaction between the probe pul...

Materials with anisotropic material parameters can be utilized to fabricate many fascinating devices, such as hyperlenses, metasolids, and one-way waveguides. In this study, we analyze the effects of geometric anisotropy on a two-dimensional metamaterial composed of a rectangular array of elliptic cylinders and derive an effective medium theory for such a metamaterial. We find that it is possib...

We propose an effective-medium theory for random aggregates of small spherical particles that accounts for the finite size of the embedding volume. The technique is based on the identification of the first two orders of the Born series within a finite volume for the coherent field and the effective field. Although the convergence of the Born series requires a finite volume, the effective consta...

Rights: © 1987 American Physical Society (APS). This is the accepted version of the following article: Jacobsen, K. W. & Norskov, J. K. & Puska, Martti J. 1987. Interatomic interactions in the effective-medium theory. Physical Review B. Volume 35, Issue 14. 7423-7442. ISSN 1550-235X (electronic). DOI: 10.1103/physrevb.35.7423, which has been published in final form at http://journals.aps.org/pr...