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Our most prominent section provides worksheets to learn electrodynamics.
In this section you can learn about electrostatics, magnetostatics, circuit theory and even full electrodynamics.
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Seven equations that shaped modern physics — from Newton's mechanics to the Standard Model. A concise tour of the math behind force, energy, light, atoms, entropy, spacetime, and the strong force.
Circuit quantum electrodynamics brings the physics of light-matter interaction into superconducting circuits, providing one of the most promising platforms for quantum computation. This article covers the Jaynes-Cummings model, transmon qubits, and the path from first strong-coupling experiments to today's multi-qubit processors.
We calculate the force per unit length between two infinite parallel current-carrying wires using Ampère's law and the Lorentz force, and discuss how this result once defined the ampere.
Explore the transition from classical to quantum physics through the radiation of an electron in circular motion, deriving the power radiated and its implications for particle physics and technology.
From laser links that outperform radio by orders of magnitude to telescopes peering back to the first galaxies, optical technologies are central to modern spaceflight. This article surveys five key areas: free-space optical communication, space telescopes, optical navigation sensors, photovoltaics, and laser-based remote sensing.
A charge moving through a magnetic field experiences a perpendicular force due to the Lorentz force.
Semiconductors in all dimensionalities ranging from 0D quantum dots and molecules to 3D bulk crystals support bound electron-hole pair quasiparticles termed as excitons.
Future technologies underpinning high-performance optical communications, ultrafast computations and compact biosensing will rely on densely packed reconfigurable optical circuitry based on nanophotonics.
In the initial stages of its development, atomic theory had to bypass the laws of classical electromagnetism in an ad hoc manner in order to explain the stability of atoms.
Have you ever come accross somebody with a 'Let There Be Light' reference followed by some weird looking formulas? Here's the explanations what the reference and formulas are all about!
Antenna arrays are an important class of antennas which are widely used in point to point communication systems, where a very high directive beam of radiation is needed.
In this problem you will learn how to apply the Fourier Transformation to a simple exponentially decaying electric field.
We compute the spectrum of a rectangular shaped pulse with underlying oscillating electric field.
The Heaviside step function is very important in physics. It often models a sudden switch-on phenomenon and is therefore present in a lot of integrals.
One of the most widely used antennas in telecommunication is the dipole antenna. In this problem, we investigate the radiation properties of such an antenna.
In this problem we first investigate the radiation properties of a very short and thin filament of current.
Devices composed of qubits and a suitably designed nanoantenna might be used for quantum communication.
Using the charged ring potential we derive the potential and field for a homogeneously charged disk. Limiting cases and generalizations are discussed.
The quadrupole moments of a homogeneously charged ellipsoid are calculated. The result will help us to understand how and why the quadrupole moments of an ellipsoidal charge distribution changes if it gets into an excited state.
Alaee et al. recently reported the observation of 'extreme coupling' in plasmonic systems. We will describe how the experiment may give plasmonics new perspectives.
Devices composed of qubits and a suitably designed nanoantenna might be used for quantum computation.
Classical electrodynamics is the first field theory students usually encounter. Let us just take a look what kind of impact the discovery of Maxwell's equations had on science.
The Drude model explains the electrodynamic properties of metals. The simple approach is to regard the conduction band electrons as non-interacting electron gas.
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.
A new implementation of static caching provides photonics101.com with ultra-fast page loads.
We will study the movement of charged particles in a so-called Paul trap by solving the equations of motion using approximative methods.
Usually, gauge transformations are used to simplify certain calculations. In this problem, we want to use them to derive charge conservation from the invariance of the action S.
The iFDTD is a software made for fast and easy electrodynamic simulations. Its biggest strength lies in the visualization of electrodynamic effects like total internal reflection, light propagation in photonic crystals etc.
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.
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.