About this Site
Our intention for the site is plain and simple: provide electrodynamic problems with solutions. We hope that the information may help one or the other to understand photonics. We believe that the best way to achieve this is to solve problems and have their solutions at hand. We also take the chance to supply additional information in the background section for most of the problems. This might be an explanation of a related research topic or more in-depth information. We hope you enjoy your path to understand photonics!
A Simple Model for Atomic Nuclei: The Deformed Sphere and its Multipole Moments
We will calculate the first three multipole moments of a deformed charged sphere. Such a charge distribution is often used to model nuclei and understand their stability. The rotational symmetry of the problem will ease our computations significantly.
The Magnetic Field of an Infinite Wire
One of the basic problems of magnetostatics is the infinite wire. Using the several symmetries of the current distribution we will be able to not only find the magnetic field - we will also verify the "right-hand rule".
Secure Communication: Ultrabright Single Photon Sources
Single-photon-sources are extremely desirable devices as they can enable quantum-secure communication. But to enable a fast information exchange, a tradeoff between quantity and quality of the photons has to be considered.
Ultra-fast Quantum Computation: Strong Coupling of Qubits via Nanoantennas
Devices composed of qubits and a suitably designed nanoantenna might be used for quantum computation. They should not only be much faster than any known implementation but also extremely small.
Graphene Plasmonics: Antennas for THz Spectroscopy
Graphene is a two-dimensional material with extraordinary properties. Its tunable conductivity makes the material a prime candidate for sophisticated light-matter interactions. We will see how graphene antennas can be used to dictate a molecule's emission frequencies
The Interactive FDTD Toolbox
With the freely available interactive FDTD toolbox you can simulate and visualize the electromagnetic field in a structured material such as a photonic crystals, waveguides or investigate refraction at dielectric boundaries and diffraction in free space.