Conference paper
Control of the rings of exceptional points in photonic crystal slabs
Department of Electrical Engineering, Technical University of Denmark1
Electromagnetic Systems, Department of Electrical Engineering, Technical University of Denmark2
Department of Photonics Engineering, Technical University of Denmark3
Quantum and Laser Photonics, Department of Photonics Engineering, Technical University of Denmark4
Accidental Dirac cones of linear dispersion can occur in photonic crystal (PhC) structures [1]. These configurations can be easily manufactured providing an accessible platform for studying topological properties of Dirac cones and their influence on light-matter interactions. Recently, it has been shown that when the system becomes non-Hermitian, e.g. it is an open system exhibiting radiation losses, Dirac cones can be deformed spawning rings of exceptional points [2].
Within the ring, the dispersion follows the two-dimensional flat band which provides a high density of states and therefore high Purcell factors. Moreover, strong dispersion of loss in the center of the Brillouin zone allows to significantly improve the performance of large-area single mode PhC lasers [3].
These lasers exploit bound states in the continuum [4], and we discuss their relation to Dirac cones.
| Language: | English |
|---|---|
| Publisher: | IEEE |
| Year: | 2017 |
| Pages: | 1-1 |
| Proceedings: | The 2017 European Conference on Lasers and Electro-Optics |
| ISBN: | 1509067361 , 150906737X , 150906737x , 9781509067367 and 9781509067374 |
| Types: | Conference paper |
| DOI: | 10.1109/CLEOE-EQEC.2017.8087806 |
| ORCIDs: | Kaminski, Piotr Marek , Breinbjerg, Olav , Mørk, Jesper and Arslanagic, Samel |
Dispersion Eigenvalues and eigenfunctions Laser modes Photonic crystals Ring lasers Slabs Surface emitting lasers
Brillouin zone Brillouin zones Dirac cones and bound states exceptional points high Purcell factors high density of states large-area single mode photonic crystal lasers laser cavity resonators light-matter interactions linear dispersion nonHermitian system open system optical control optical dispersion optical losses photonic crystals radiation losses radiation pressure ring control solid lasers topological properties two-dimensional flat band
