Coherent Topological Polariton Laser

Tristan H. Harder*, Meng Sun, Oleg A. Egorov, Ihor Vakulchyk, Johannes Beierlein, Philipp Gagel, Monika Emmerling, Christian Schneider, Ulf Peschel, Ivan G. Savenko, Sebastian Klembt*, Sven Höfling

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

21 Scopus citations


Topological concepts have been applied to a wide range of fields in order to successfully describe the emergence of robust edge modes that are unaffected by scattering or disorder. In photonics, indications of lasing from topologically protected modes with improved overall laser characteristics were observed. Here, we study exciton-polariton microcavity traps that are arranged in a one-dimensional Su-Schrieffer-Heeger lattice and form a topological defect mode from which we unequivocally observe highly coherent polariton lasing. Additionally, we confirm the excitonic contribution to the polariton lasing by applying an external magnetic field. These systematic experimental findings of robust lasing and high temporal coherence are meticulously reproduced by a combination of a generalized Gross-Pitaevskii model and a Lindblad master equation model. Thus, by using the comparatively simple SSH geometry, we are able to describe and control the exciton-polariton topological lasing, allowing for a deeper understanding of topological effects on microlasers.

Original languageEnglish
Pages (from-to)1377-1384
Number of pages8
JournalACS Photonics
Issue number5
StatePublished - 19 May 2021
Externally publishedYes


  • Su-Schrieffer-Heeger
  • coherence
  • exciton-polariton
  • polariton condensation
  • topological lasing


Dive into the research topics of 'Coherent Topological Polariton Laser'. Together they form a unique fingerprint.

Cite this