Abstract
In this article, we propose and investigate numerically high-contrast all-dielectric
gratings with broken vertical symmetry showing tunable dispersions from ultra-flat zero-curvature band to infinite curvature (so-called Dirac cone) band at the center of the first Brillouin zone. These structures consist in amorphous silicon structured so as to exhibit a vertical asymmetry. We theoretically studied these structures using the temporal coupled mode theory and showed that the vertical asymmetry of the gratings is the key parameter that can provide the very particular dispersions of the photonic modes. These dispersions may find substantial applications in several fields such as non-linear optics, sensing, spectral filter,
solitonics and polaritonics.
gratings with broken vertical symmetry showing tunable dispersions from ultra-flat zero-curvature band to infinite curvature (so-called Dirac cone) band at the center of the first Brillouin zone. These structures consist in amorphous silicon structured so as to exhibit a vertical asymmetry. We theoretically studied these structures using the temporal coupled mode theory and showed that the vertical asymmetry of the gratings is the key parameter that can provide the very particular dispersions of the photonic modes. These dispersions may find substantial applications in several fields such as non-linear optics, sensing, spectral filter,
solitonics and polaritonics.
| Original language | English |
|---|---|
| Title of host publication | 11 th International Congress on Engineered Material Platforms for Novel Wave Phenomena – Metamaterials 2017 |
| Publication status | Published - 28 Aug 2017 |