2D Topological Edge States in Periodic Space-Time Interfaces
Fuente:
arXiv
Enregistré dans:
| Auteurs principaux: | , , , , , , |
|---|---|
| Format: | Preprint |
| Publié: |
2025
|
| Sujets: | |
| Accès en ligne: | |
| Tags: |
Ajouter un tag
Pas de tags, Soyez le premier à ajouter un tag!
|
| _version_ | 1866914568185315328 |
|---|---|
| author | Segal, Ohad Plotnik, Yonatan Lustig, Eran Sharabi, Yonatan Cohen, Moshe-Ishay Dikopoltsev, Alexander Segev, Mordechai |
| author_facet | Segal, Ohad Plotnik, Yonatan Lustig, Eran Sharabi, Yonatan Cohen, Moshe-Ishay Dikopoltsev, Alexander Segev, Mordechai |
| contents | Topological edge states in systems of two (or more) dimensions offer scattering-free transport, exhibiting robustness to inhomogeneities and disorder. In a different domain, time-modulated systems, such as photonic time crystals (PTCs), offer non-resonant amplification drawing energy from the modulation. Combining these concepts, we explore topological systems that vary periodically in both time and space, manifesting the best of both worlds. We present topological phases and topological edge states in photonic space-time crystals - materials in which the refractive index varies periodically in both space and time, displaying bandgaps in both frequency and momentum. The topological nature of this system leads to topological invariants that govern the phase between refracted and reflected waves generated from both the spatial and the temporal interfaces. The 2D nature of this system leads to propagating edge states, and a unique edge state that grows exponentially in power whilst following the space-time edge. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2506_03986 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | 2D Topological Edge States in Periodic Space-Time Interfaces Segal, Ohad Plotnik, Yonatan Lustig, Eran Sharabi, Yonatan Cohen, Moshe-Ishay Dikopoltsev, Alexander Segev, Mordechai Optics Topological edge states in systems of two (or more) dimensions offer scattering-free transport, exhibiting robustness to inhomogeneities and disorder. In a different domain, time-modulated systems, such as photonic time crystals (PTCs), offer non-resonant amplification drawing energy from the modulation. Combining these concepts, we explore topological systems that vary periodically in both time and space, manifesting the best of both worlds. We present topological phases and topological edge states in photonic space-time crystals - materials in which the refractive index varies periodically in both space and time, displaying bandgaps in both frequency and momentum. The topological nature of this system leads to topological invariants that govern the phase between refracted and reflected waves generated from both the spatial and the temporal interfaces. The 2D nature of this system leads to propagating edge states, and a unique edge state that grows exponentially in power whilst following the space-time edge. |
| title | 2D Topological Edge States in Periodic Space-Time Interfaces |
| topic | Optics |
| url | https://arxiv.org/abs/2506.03986 |