2013

A low-cost AFM setup with an interferometer for undergraduates and secondary-school students
A. Bergmann, D. Feigl, D. Kuhn, M. Schaupp, G. Quast, K. Busch, L. Eichner, and J. Schumacher (2013)
European Journal of Physics 34:901
Atomic force microscopy (AFM) is an important tool in nanotechnology. This method makes it possible to observe nanoscopic surfaces beyond the resolution of light microscopy. In order to provide...
Quantum Bocce: Magnon–magnon collisions between propagating and bound states in 1D spin chains
P. Longo, A. D Greentree, K. Busch, and J. H Cole (2013)
Physics Letters A 377:1242
The dynamics of two magnons in a Heisenberg spin chain under the influence of a non-uniform magnetic field is investigated by means of a numerical wave-function-based approach using a Holstein–...
Modeling spontaneous emission control in photonic crystals by ferromagnetic resonance
U. Hoeppe, C. Wolff, H. Benner, and K. Busch (2013)
IEEE Transactions on Magnetics 49:1013
The radiation dynamics of a magnetic dipole located inside a photonic crystal has been considered as an analogue for optical emission of a point-like emitter in such a crystal. We have experimentally...
Direct transcription of two-dimensional colloidal crystal arrays into three-dimensional photonic crystals
A. Vlad, A. Frölich, T. Zebrowski, C. A Dutu, K. Busch, S. Melinte, M. Wegener, and I. Huynen (2013)
Advanced Functional Materials 23:1164
A simple protocol for the fabrication of three-dimensional (3D) photonic crystals in silicon is presented. Surface structuring by nanosphere lithography is merged with a novel silicon etching method...
From isolated metaatoms to photonic metamaterials: evolution of the plasmonic near-field
F. von Cube, S. Irsen, R. Diehl, J. Niegemann, K. Busch, and S. Linden (2013)
Nano Letters 13:703
Metamaterials are artificial media which can provide optical properties not available from natural materials. These properties often result from the resonant excitation of plasmonic modes in the...
Design and numerical optimization of an easy-to-fabricate photon-to-plasmon coupler for quantum plasmonics
G. Kewes, A. W Schell, R. Henze, R. S Schönfeld, S. Burger, K. Busch, and O. Benson (2013)
Applied Physics Letters 102:051104
We design an on-chip single mode photon to surface-plasmon coupler. Our coupler consists of a tapered dielectric waveguide and a V-shaped plasmonic part. In contrast to other concepts designated to...

2012

Quantitative experimental determination of scattering and absorption cross-section spectra of individual optical metallic nanoantennas
M. Husnik, S. Linden, R. Diehl, J. Niegemann, K. Busch, and M. Wegener (2012)
Physical Review Letters 109:233902
Antennas convert propagating radiation to localized electromagnetic energy and to heat. To unambiguously separate between these two aspects, one needs to quantitatively determine the antenna...
Weak localization and magnetoresistance in a two-leg ladder model
M. P Schneider, S. T Carr, I. V Gornyi, and A. D Mirlin (2012)
Physical Review B 86:155141
We analyze the weak-localization correction to the conductivity of a spinless two-leg ladder model in the limit of strong dephasing, paying particular attention to the presence of a magnetic field,...
Constraints in the generation of photonic Wannier functions
C. Wolff and K. Busch (2012)
Physica B: Condensed Matter 407:4051
We report on the generation of maximally localized photonic Wannier functions under constraints. This allows us to impress certain symmetry properties of the underlying Photonic Crystal onto the...
A construction guide to analytically generated meshes for the Fourier Modal Method
J. Küchenmeister, T. Zebrowski, and K. Busch (2012)
Optics Express 20:17319
The concepts of adaptive coordinates and adaptive spatial resolution significantly enhance the performance of Fourier Modal Method for the simulation of periodic photonic structures, especially...
Pulse propagation of photon-added coherent states in waveguides with side-coupled nonlinear cavities
P. Longo and K Busch (2012)
Optics Letters 37:1793
We present a theoretical analysis of pulse propagation in a waveguide with a side-coupled Kerr nonlinear cavity. As a specific application, we demonstrate how the nonlinearity has a profound...
The Hong-Ou-Mandel effect in the context of few-photon scattering
P. Longo, J. H Cole, and K. Busch (2012)
Optics Express 20:12326
The Hong-Ou-Mandel effect is studied in the context of two-photon transport in a one-dimensional waveguide with a single scatterer. We numerically investigate the scattering problem within a time-...
A low-cost setup for microstructuring experiments using a homemade UV laser
A. Bergmann, S. Jansen, S. Christoffel, A. Zimmermann, K. Busch, and R. Hofmann (2012)
American Journal of Physics 80:260
We present a simple high school and university undergraduate laboratory setup, with which we are able to texture microscopic structures into polymer and dye films using a homemade UV nitrogen laser....
Cluster coherent potential approximation for disordered photonic crystals using photonic Wannier functions
M. Köhl, C. Wolff, and K. Busch (2012)
Optics Letters 37:560
We present an investigation of disordered photonic crystals (PhCs) based on the combination of photonic Wannier functions with the concept of the coherent potential approximation (CPA). In particular...
Direct Observation of Non-Markovian Radiation Dynamics in 3D Bulk Photonic Crystals
U. Hoeppe, C. Wolff, J. Küchenmeister, J. Niegemann, M. Drescher, H. Benner, and K. Busch (2012)
Physical Review Letters 108:043603
Since the very first proposition of photonic crystals, their influence on the dynamics of spontaneous emission has been of great interest. The radiation dynamics is described by an integration kernel...
Efficient low-storage Runge–Kutta schemes with optimized stability regions
J. Niegemann, R. Diehl, and K. Busch (2012)
Journal of Computational Physics 231:364
A variety of numerical calculations, especially when considering wave propagation, are based on the method-of-lines, where time-dependent partial differential equations (PDEs) are first discretized...

2011

Analysis of light propagation in slotted resonator based systems via coupled-mode theory
K. R Hiremath, J. Niegemann, and K. Busch (2011)
Optics Express 19:8641
Optical devices with a slot configuration offer the distinct feature of strong electric field confinement in a low refractive index region and are, therefore, of considerable interest in many...
Computing electron energy loss spectra with the Discontinuous Galerkin Time-Domain method
C. Matyssek, J. Niegemann, W. Hergert, and K. Busch (2011)
Photonics and Nanostructures - Fundamentals and Applications 9:367
In this work, we demonstrate how to extract electron energy loss spectra of metallic nano-particles from time-domain computations. Specifically, we employ the Discontinuous Galerkin Time-Domain (DGTD...
Discontinuous Galerkin methods in nanophotonics
K. Busch, M. König, and J. Niegemann (2011)
Laser & Photonics Reviews 5:773
This article reviews the state of the recently developed discontinuous Galerkin finite element method for the efficient numerical treatment of nanophotonic systems. This approach combines the...
Distance-dependence of the coupling between split-ring resonators and single-quantum-well gain
N. Meinzer, M. König, M. Ruther, S. Linden, G. Khitrova, H. M Gibbs, K. Busch, and M. Wegener (2011)
Applied Physics Letters 99:111104
We present low-temperature femtosecond pump-probe experiments on arrays of silver split-ring resonators coupled to single quantum wells, in which we vary the geometrical separation between the two...

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