Abstract
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.
Original language | English |
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Title of host publication | 2017 Conference on Lasers and Electro-optics Europe and European Quantum Electronics Conference |
Number of pages | 1 |
Publisher | IEEE |
Publication date | 2017 |
Pages | 1-1 |
ISBN (Print) | 9781509067367 |
DOIs | |
Publication status | Published - 2017 |
Event | The 2017 European Conference on Lasers and Electro-Optics - Munich, Germany Duration: 25 Jun 2017 → 29 Jun 2017 http://www.cleoeurope.org/ |
Conference
Conference | The 2017 European Conference on Lasers and Electro-Optics |
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Country/Territory | Germany |
City | Munich |
Period | 25/06/2017 → 29/06/2017 |
Internet address |
Keywords
- Slabs
- Photonic crystals
- Dispersion
- Laser modes
- Ring lasers
- Eigenvalues and eigenfunctions
- Surface emitting lasers