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Sum rules and physical bounds on passive metamaterials

Frequency dependence of the permittivity and permeability is inevitable in metamaterial applications such as cloaking and perfect lenses. In this paper, Herglotz functions are used as a tool to construct sum rules from which we derive physical bounds suited for metamaterial applications, where the material parameters are often designed to be negative or near zero in the frequency band of interest.

Monolithic single-mode SU-8 waveguides for integrated optics

We present the fabrication and characterization of single mode waveguides fabricated monolithically in SU-8. SU-8 is a negative resist, which can be structured by UV lithography followed by a baking step to induce cross-linking. As a material platform, SU-8 is well suited for systems used for biochemical analysis, as it possesses very high chemical resistance and good mechanical stability. Here we

Atlas Data-Challenge 1 on NorduGrid

The first LHC application ever to be executed in a computational Grid environment is the so-called ATLAS Data-Challenge 1, more specifically, the part assigned to the Scandinavian members of the ATLAS Collaboration. Taking advantage of the NorduGrid testbed and tools, physicists from Denmark, Norway and Sweden were able to participate in the overall exercise starting in July 2002 and continuing th

Modeling and Optimization with Modelica and Optimica Using the JModelica.org Open Source Platform

This paper reports a new Modelica-based open source project entitled JModelica.org, targeted towards dynamic optimization. The objective of the project is to bridge the gap between the need for high-level description languages and the details of numerical optimization algorithms. JModelica.org is also intended as an extensible platform where algorithm developers, particularly in the academic commu