93 citations · 455 across the 18 of their papers we have counts for
18 papers
Detecting the Berry curvature in photonic graphene
R. L. Heinisch, H. Fehske
We describe a method for measuring the Berry curvature from the wave-packet dynamics in perturbed arrays of evanescently coupled optical waveguides with honeycomb lattice structure…
Surface mode hybridization in the optical response of core-shell particles
E. Thiessen, R. L. Heinisch, F. X. Bronold +1
We present an exact rewriting of the Mie coefficients describing the scattering of light by a spherical core-shell particle which enables their interpretation in terms of an hybrid…
Scattering of infrared light by dielectric core-shell particles
E. Thiessen, F. X. Bronold, R. L. Heinisch +1
We study the scattering of infrared light by small dielectric core-shell particles taking a sapphire sphere with a CaO core as an example. The extinction efficiency of such a parti…
Scattering of two-dimensional Dirac fermions on gate-defined oscillating quantum dots
C. Schulz, R. L. Heinisch, H. Fehske
Within an effective Dirac-Weyl theory we solve the scattering problem for massless chiral fermions impinging on a cylindrical time-dependent potential barrier. The set-up we consid…
Electron flow in circular graphene quantum dots
C. Schulz, R. L. Heinisch, H. Fehske
We study the electron propagation in a circular electrostatically defined quantum dot in graphene. Solving the scattering problem for a plane Dirac electron wave we identify differ…
Dot-bound and dispersive states in graphene quantum dot superlattices
A. Pieper, R. L. Heinisch, G. Wellein +1
We consider a square lattice configuration of circular gate-defined quantum dots in an unbiased graphene sheet and calculate the electronic, particularly spectral properties of fin…
Infrared light extinction by charged dielectric core-coat particles
Elena Thiessen, Rafael L. Heinisch, Franz X. Bronold +1
We study the effect of surplus electrons on the infrared extinction of dielectric particles with a core-coat structure and propose to use it for an optical measurement of the parti…
Electron dynamics in graphene with gate-defined quantum dots
A. Pieper, R. L. Heinisch, H. Fehske
We use numerically exact Chebyshev expansion and kernel polynomial methods to study transport through circular graphene quantum dots in the framework of a tight-binding honeycomb l…
Optical signatures of the Charge of a Dielectric Particle in a Plasma
R. L. Heinisch, F. X. Bronold, H. Fehske
With an eye on dust particles immersed into an ionized gas, we study the effect of a negative charge on the scattering of light by a dielectric particle with a strong transverse op…
Surface electrons at plasma walls
Rafael L. Heinisch, Franz X. Bronold, Holger Fehske
In this chapter we introduce a microscopic modelling of the surplus electrons on the plasma wall which complements the classical description of the plasma sheath. First we introduc…
Mie scattering analog in graphene: lensing, particle confinement, and depletion of Klein tunneling
R. L. Heinisch, F. X. Bronold, H. Fehske
Guided by the analogy to Mie scattering of light on small particles we show that the propagation of a Dirac-electron wave in graphene can be manipulated by a circular gated region…
Mie scattering by a charged dielectric particle
R. L. Heinisch, F. X. Bronold, H. Fehske
We study for a dielectric particle the effect of surplus electrons on the anomalous scattering of light arising from the transverse optical phonon resonance in the particle's diele…
Wall charge and potential from a microscopic point of view
F. X. Bronold, H. Fehske, R. L. Heinisch +1
Macroscopic objects floating in an ionized gas (plasma walls) accumulate electrons more efficiently than ions because the influx of electrons outruns the influx of ions. The floati…
Electron surface layer at the interface of a plasma and a dielectric wall
Rafael L. Heinisch, Franz X. Bronold, Holger Fehske
We study the potential and the charge distribution across the interface of a plasma and a dielectric wall. For this purpose, the charge bound to the wall is modelled as a quasi-sta…
Physisorption of an electron in deep surface potentials off a dielectric surface
R. L. Heinisch, F. X. Bronold, H. Fehske
We study phonon-mediated adsorption and desorption of an electron at dielectric surfaces with deep polarization-induced surface potentials where multi-phonon transitions are respon…
Plasma walls beyond the perfect absorber approximation for electrons
Franz X. Bronold, Rafael L. Heinisch, Johannes Marbach +1
Plasma walls accumulate electrons more efficiently than ions leading to wall potentials which are negative with respect to the plasma potential. Theoretically, walls are usually tr…
Phonon-mediated sticking of electrons at dielectric surfaces
R. L. Heinisch, F. X. Bronold, H. Fehske
We study phonon-mediated temporary trapping of an electron in polarization-induced external surface states (image states) of a dielectric surface. Our approach is based on a quantu…
Phonon-mediated desorption of image-bound electrons from dielectric surfaces
R. L. Heinisch, F. X. Bronold, H. Fehske
A complete kinetic modeling of an ionized gas in contact with a surface requires the knowledge of the electron desorption time and the electron sticking coefficient. We calculate t…