Control of the rings of exceptional points in photonic crystal slabs

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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 languageEnglish
Title of host publication2017 Conference on Lasers and Electro-optics Europe and European Quantum Electronics Conference
Number of pages1
PublisherIEEE
Publication date2017
Pages1-1
ISBN (Print)9781509067367
DOIs
Publication statusPublished - 2017
EventThe European Conference on Lasers and Electro-Optics, CLEO_Europe 2017 - Munich (ICM), Germany., Munich, Germany
Duration: 25 Jun 201729 Jun 2017
http://www.cleoeurope.org/

Conference

ConferenceThe European Conference on Lasers and Electro-Optics, CLEO_Europe 2017
LocationMunich (ICM), Germany.
CountryGermany
CityMunich
Period25/06/201729/06/2017
Internet address
Series2017 Conference on Lasers and Electro-optics Europe and European Quantum Electronics Conference (cleo/europe-eqec)

Keywords

  • Slabs
  • Photonic crystals
  • Dispersion
  • Laser modes
  • Ring lasers
  • Eigenvalues and eigenfunctions
  • Surface emitting lasers

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