Surface polaritons on left-handed cylinders: A complex angular momentum analysis

We consider the scattering of electromagnetic waves by a left-handed cylinder -- i.e., by a cylinder fabricated from a left-handed material -- in the framework of complex angular momentum techniques. We discuss both the TE and TM theories. We emphasize more particularly the resonant aspects of the problem linked to the existence of surface polaritons. We prove that the long-lived resonant modes can be classified into distinct families, each family being generated by one surface polariton propagating close to the cylinder surface and we physically describe all the surface polaritons by providing, for each one, its dispersion relation and its damping. This can be realized by noting that each surface polariton corresponds to a particular Regge pole of the $S$ matrix of the cylinder. Moreover, for both polarizations, we find that there exists a particular surface polariton which corresponds, in the large-radius limit, to the surface polariton which is supported by the plane interface. There exists also an infinite family of surface polaritons of whispering-gallery type which have no analogs in the plane interface case and which are specific to left-handed materials.Comment: published version. v3: reference list correcte

Knoecherne Integration und Biokompatibilitaet eines neuen resorbierbaren Polymers zur Schraubenaugmentation im osteoporotischen Knochen

The aim of this study was to investigate different variations of a new resorbable bone cement developed on an alkylene bis(dilactoyl)-methacrylate basis in terms of long-term biocompatibility, degradation and mechanical reinforcement in a sheep model. Further, the suitability of ovarectomized sheep as osteoporotic large animal model was verified for investigation of biomaterial.Available from: <a href=http://edoc.ub.uni-muenchen.de/archive/00001274 target=NewWindow>http://edoc.ub.uni-muenchen.de/archive/00001274</a> / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEDEGerman

Programmname: MATGRAF. Fach: Mathematik

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Impurity-disordered, coupled-stripe AlxGa1−xAs-GaAs quantum well laser

Continuous room‐temperature operation of impurity‐disordered, coupled‐stripe Al x Ga1−x As‐GaAs quantum wellheterostructure lasers is described. Silicon (donor) diffusion at 850 °C is used to produce layer disordering and index guiding, in addition to providing carrier confinement in a ten‐stripe coupled array (8‐μm‐wide stripes on 10‐μm centers)