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Synthetic band-structure engineering in polariton crystals with non-Hermitian topological phases

Author

Listed:
  • L. Pickup

    (University of Southampton)

  • H. Sigurdsson

    (University of Southampton
    Skolkovo Institute of Science and Technology)

  • J. Ruostekoski

    (Lancaster University)

  • P. G. Lagoudakis

    (University of Southampton
    Skolkovo Institute of Science and Technology)

Abstract

Synthetic crystal lattices provide ideal environments for simulating and exploring the band structure of solid-state materials in clean and controlled experimental settings. Physical realisations have, so far, dominantly focused on implementing irreversible patterning of the system, or interference techniques such as optical lattices of cold atoms. Here, we realise reprogrammable synthetic band-structure engineering in an all optical exciton-polariton lattice. We demonstrate polariton condensation into excited states of linear one-dimensional lattices, periodic rings, dimerised non-trivial topological phases, and defect modes utilising malleable optically imprinted non-Hermitian potential landscapes. The stable excited nature of the condensate lattice with strong interactions between sites results in an actively tuneable non-Hermitian analogue of the Su-Schrieffer-Heeger system.

Suggested Citation

  • L. Pickup & H. Sigurdsson & J. Ruostekoski & P. G. Lagoudakis, 2020. "Synthetic band-structure engineering in polariton crystals with non-Hermitian topological phases," Nature Communications, Nature, vol. 11(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-18213-1
    DOI: 10.1038/s41467-020-18213-1
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    Cited by:

    1. M. Wurdack & T. Yun & M. Katzer & A. G. Truscott & A. Knorr & M. Selig & E. A. Ostrovskaya & E. Estrecho, 2023. "Negative-mass exciton polaritons induced by dissipative light-matter coupling in an atomically thin semiconductor," Nature Communications, Nature, vol. 14(1), pages 1-7, December.

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