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5 papers · 1 filter
Small-core photonic crystal fibers with weakly disordered air-hole claddings
N. A. Mortensen, M. D. Nielsen, J. R. Folkenberg +2
Motivated by recent experimental work by Folkenberg et al. we consider the effect of weak disorder in the air-hole lattice of small-core photonic crystal fibers. We find that the b…
Energy funneling in a bent chain of Morse oscillators with long-range coupling
P. V. Larsen, P. L. Christiansen, O. Bang +2
A bent chain of coupled Morse oscillators with long-range dispersive interaction is considered. Moving localized excitations may be trapped in the bending region. Thus chain geomet…
Simulation of Cu-Mg metallic glass: Thermodynamics and Structure
Nicholas P. Bailey, Jakob Schiøtz, Karsten W. Jacobsen
We have obtained effective medium theory (EMT) interatomic potential parameters suitable for studying Cu-Mg metallic glasses. We present thermodynamic and structural results from s…
A "poor man's approach" to modelling of micro-structured optical fibres
Jesper Riishede, Niels Asger Mortensen, Jesper Laegsgaard
Based on the scalar Helmholtz equation and the finite-difference approximation, we formulate a matrix eigenvalue problem for the calculation of propagation constants, beta(omega),…
Popularizing mathematics: from eight to infinity
Vagn Lundsgaard Hansen
It is rare to succeed in getting mathematics into ordinary conversation without meeting all kinds of reservations. In order to raise public awareness of mathematics effectively, it…