Harnessing the natural resonances of time-varying dispersive interfaces
| Autor: | Rizza, Carlo, Vincenti, Maria Antonietta, Castaldi, Giuseppe, Contestabile, Alessandra, Galdi, Vincenzo, Scalora, Michael |
|---|---|
| Rok vydání: | 2024 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | Space-time modulation of electromagnetic parameters offers novel exciting possibilities for advanced field manipulations. In this study, we explore wave scattering from a time-varying interface characterized by a Lorentz-type dispersion with a step-like temporal variation in its parameters. Our findings reveal a new process: an unconventional frequency generation at the natural resonances of the system. Remarkably, this phenomenon enables the coupling of propagating waves to evanescent ones, allowing the direct far-field excitation of surface-wave modes without the mediation of spatial gratings or prisms. These results suggest a novel strategy for designing compact and ultra-fast photonic devices, eliminating the necessity for subwavelength spatial structuring or prolonged temporal modulations. Comment: 7 pages; 4 figures |
| Databáze: | arXiv |
| Externí odkaz: |
|