Related Experiment Video
Updated: Jan 1, 2026

Measurement of the Directional Information Flow in fNIRS-Hyperscanning Data using the Partial Wavelet Transform Coherence Method
Published on: September 3, 2021
Efficient propagation of the coherency matrix inspired by plenoptic field representations of nonparaxial Wigner
Abstract:
The angle-impact Wigner function (AIWF) is a tool that assigns weights to rays in a way such that ray tracing can be used to exactly model the irradiance and polarization properties of nonparaxial, partially coherent, partially polarized electromagnetic fields. Although the AIWF offers computational advantages over more conventional wave propagation integrals, in practice, the large number of rays that must be traced has proved to be a significant bottleneck. We demonstrate an efficient method to implement AIWF propagation algorithms inspired by a plenoptic field representation. We illustrate the method by computing irradiance and polarization properties of several paraxial and nonparaxial fields.
Related Concept Videos
Propagation of Action Potentials
Neurons (nerve cells) have a resting membrane potential, with a slightly negative charge inside compared to outside. This is maintained by ion channels, such as sodium (Na+) and potassium (K+) channels, which control the flow of ions. When a stimulus, like a touch or a signal from another neuron, triggers the neuron, sodium channels open, allowing sodium ions to...
Propagation of Waves
Consider a scenario where a wave propagates from a string of low linear mass density to a string of high linear mass density. In such a case, the reflected wave is out of phase with respect to the incident wave, however the...
Propagation of Uncertainty from Random Error
Propagation of Uncertainty from Systematic Error
Area Computation by the Alternative Coordinate Method
Plane Electromagnetic Waves I
The EM field is assumed to be a...

