Matches in SemOpenAlex for { <https://semopenalex.org/work/W3036696035> ?p ?o ?g. }
- W3036696035 abstract "We have analyzed the notions of group velocity ${V}_{g}$ and energy velocity ${V}_{E}$ for light pulses propagating inside one-dimensional photonic band gap structures of finite length. We find that the two velocities are related through the transmission coefficient t as ${V}_{E}=|t{|}^{2}{V}_{g}.$ It follows that ${V}_{E}{=V}_{g}$ only when the transmittance is unity $(|t{|}^{2}=1).$ This is due to the effective dispersive properties of finite layered structures, and it allows us to better understand a wide range of phenomena, such as superluminal pulse propagation. In fact, placing the requirement that the energy velocity should remain subluminal leads directly to the condition ${V}_{g}<~c/|t{|}^{2}.$ This condition places a large upper limit on the allowed group velocity of the tunneling pulse at frequencies of vanishingly small transmission." @default.
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- W3036696035 date "2001-02-23" @default.
- W3036696035 modified "2023-09-29" @default.
- W3036696035 title "Group velocity, energy velocity, and superluminal propagation in finite photonic band-gap structures" @default.
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- W3036696035 doi "https://doi.org/10.1103/physreve.63.036610" @default.
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