Related Experiment Video
Updated: Mar 19, 2026

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
Published on: January 28, 2019
Evolution of energy flow in the focal field of azimuthally polarized Lorentz-Gauss beams under helico-conical phase
Abstract:
This paper investigates the evolution of energy flow distribution in Lorentz-Gauss beams under helico-conical modulation. Based on the Richards-Wolf vector diffraction theory, we derived the electromagnetic field expressions for azimuthally polarized Lorentz-Gauss beams. The longitudinal and transverse energy flow distributions were obtained via the Poynting vector. Subsequently, helico-conical modulation was applied to systematically examine the influence of various parameters on the energy flow distribution. Through coordinated modulation of multiple parameters, we achieved multi-directional spreading of both longitudinal and transverse energy flow components. Such energy flow distributions may offer potential applications in multi-directional optical information transfer and related fields.
Related Concept Videos
Plane Electromagnetic Waves I
The EM field is assumed to be a...
Energy In A Magnetic Field
Take an ideal inductor with zero resistance. Although it's practically impossible, assume that the coil's resistance is so small that it is practically negligible. The loss of the field's energy to dissipate thermal energy (or heat) is thus...
Plane Electromagnetic Waves II
Atomic Nuclei: Larmor Precession Frequency
Magnetic Field due to Moving Charges
Consider a point charge moving with a constant velocity. Like the electric field, the magnetic field at any point is directly proportional to the magnitude of the charge and inversely proportional to the square of the distance between the source point and the field point. However, unlike the electric field, the magnetic field is always perpendicular to the plane containing the line...
Motion Of A Charged Particle In A Magnetic Field

