A perspective classifies angular dispersion into differentiable and non-differentiable forms and argues that the latter underlies the unusual free-space behavior of space-time wave packets.
Finally, maintainingen(ω)=en is possible when ϕ(ω) =ϕo, which corresponds to X-waves that are thus AD- free with en = cos ϕo
1 Pith paper cite this work. Polarity classification is still indexing.
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Universality and non-differentiability: A new perspective on angular dispersion in optics
A perspective classifies angular dispersion into differentiable and non-differentiable forms and argues that the latter underlies the unusual free-space behavior of space-time wave packets.