Interface States in Space-Time Photonic Crystals: Topological Origin, Propagation, and Amplification
Alejandro Caballero, Thomas F. Allard, Paloma A. Huidobro · 2026
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Description
Alejandro Caballero, Thomas F. Allard, and Paloma A. Huidobro built a theory in 2026 for interface states in space-time photonic crystals, materials whose properties ripple through both space and time. Such moving modulations break the usual symmetries, which had blocked a clean topological account. The authors show a combined parity and time-reversal symmetry survives when the problem is viewed from a moving frame.
That symmetry forces a phase quantity to take discrete values, turning it into a true topological label for modulations slower or faster than light. The predicted boundary states show unusual tricks, including one-way amplification and copies of signals shifted in frequency and momentum. The scheme also covers photonic time crystals. It gives device makers a unified map for steering and boosting light.
Catalog record
| CREATOR | Alejandro Caballero, Thomas F. Allard, Paloma A. Huidobro |
|---|---|
| YEAR | 2026 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 62 KB |
| VERSION | 1.0 |
| LICENSE | CC BY 4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |