AI Article Synopsis
- The study investigates the behavior of Bloch waves in synthetic gratings moving close to the speed of light.
- It introduces a constant refractive index model that allows Bloch waves to persist even when breaking the light barrier, showing their unique dispersion characteristics.
- The research advances to a 4-wave model for effective medium approximation, revealing that activating the luminal grating leads to a significant increase in pulse amplitude and a reversal in its travel direction.
Article Abstract
We ask the question "what happens to Bloch waves in gratings synthetically moving at near the speed of light?". First we define a constant refractive index (CRI) model in which Bloch waves remain well defined as they break the light barrier, then show their dispersion rotating through 360° from negative to positive and back again. Next we introduce the effective medium approximation (EMA) then refine it into a 4-wave model which proves to be highly accurate. Finally using the Bloch waves to expand a pulse of light we demonstrate sudden inflation of pulse amplitude combined with reversal of propagation direction as a luminal grating is turned on.
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Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11501261 | PMC |
| http://dx.doi.org/10.1515/nanoph-2021-0570 | DOI Listing |
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