541 citations
- Ørsted (Denmark)DK6 papers
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9 papers
The radiated fields of the fundamental mode of photonic crystal fibers
Ali Dabirian, Mahmood Akbari, Niels Asger Mortensen
The six-fold rotational symmetry of photonic crystal fibers has important manifestations in the radiated fields in terms of i) a focusing phenomena at a finite distance from the en…
Live and Dead Nodes
S. Lehmann, A. D. Jackson
In this paper, we explore the consequences of a distinction between `live' and `dead' network nodes; `live' nodes are able to acquire new links whereas `dead' nodes are static. We…
Modeling inelastic phonon scattering in atomic- and molecular-wire junctions
Magnus Paulsson, Thomas Frederiksen, Mads Brandbyge
Computationally inexpensive approximations describing electron-phonon scattering in molecular-scale conductors are derived from the non-equilibrium Green's function method. The acc…
Observation of attraction between dark solitons
Alexander Dreischuh, Dragomir N. Neshev, Dan E. Petersen +2
We demonstrate a dramatic change in the interaction forces between dark solitons in nonlocal nonlinear media. We present what we believe is the first experimental evidence of attra…
Semi-analytical approach to short-wavelength dispersion and modal properties of photonic crystal fibers
Niels Asger Mortensen
We consider photonic crystal fibers made from arbitrary base materials and derive a unified semi-analytical approach for the dispersion and modal properties which applies to the sh…
Reexamination of Hagen-Poiseuille flow: shape-dependence of the hydraulic resistance in microchannels
Niels Asger Mortensen, Fridolin Okkels, Henrik Bruus
We consider pressure-driven, steady state Poiseuille flow in straight channels with various cross-sectional shapes: elliptic, rectangular, triangular, and harmonic-perturbed circle…