Lasing in optically induced gap states in photonic graphene

Marijana Milicevic, Olivier Bleu, Dmitry D Solnyshkov, Isabelle Sagnes, Aristide Lemaître, Luc Le Gratiet, Abdelmounaim Harouri, Jacqueline Bloch, Guillaume Malpuech, Alberto Amo

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We report polariton lasing in localised gap states in a honeycomb lattice of coupled micropillars. Localisation of the modes is induced by the optical potential created by the excitation beam, requiring no additional engineering of the otherwise homogeneous polariton lattice. The spatial shape of the gap states arises from the interplay of the orbital angular momentum eigenmodes of the cylindrical potential created by the excitation beam and the hexagonal symmetry of the underlying lattice. Our results provide insights into the engineering of defect states in two-dimensional lattices.
Original languageEnglish
Article number064
Number of pages16
JournalSciPost Physics
Issue number6
Publication statusPublished - 19 Dec 2018
Externally publishedYes

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