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simulation
comsol
Phase-Field Hydrofracture guides and COMSOL notes.
Aug 15, 2026
Qi Huang
Optics Notes#4: Vector waves
optics
notes
physics
We consider an electromagnetic plane wave in a homogeneous, isotropic, source-free medium. Let
\(\mathbf{s}\)
be a unit vector in the direction of propagation. The wave…
Aug 3, 2026
Qi Huang
Optics Notes#3: Scalar waves
optics
notes
physics
We briefly examine the simplest solution of this equation.
\[ \nabla^2 V - \frac{1}{v^2}\frac{\partial^2 V}{\partial t^2} = 0 \]
Jul 30, 2026
Qi Huang
Scalar waves
This figure shows a simple harmonic wave and the wave group formed by two nearby waves. The upper panel contains the carrier wave, while the lower panel contains the wave…
Jul 30, 2026
Qi Huang
Optics Notes#2: The wave equation and the velocity of light
optics
notes
physics
This note explains how to derive Maxwell’s wave equations.
Jul 29, 2026
Qi Huang
Optics Notes
optics
notes
This is a collection of Optics Notes
Jul 22, 2026
Qi Huang
Optics Notes#1: Electromagnetic Field
optics
notes
physics
This note introduces basic properties of the electromagnetic field.
Jul 22, 2026
Qi Huang
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