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Quantum fluids of light in all-optical scatterer lattices

Quantum fluids of light in all-optical scatterer lattices
Quantum fluids of light in all-optical scatterer lattices
One of the recently established paradigms in condensed matter physics is examining a system's behaviour in artificial potentials, giving insight into phenomena of quantum fluids in hard-to-reach settings. A prominent example is the matter-wave scatterer lattice, where high energy matter waves undergo transmission and reflection through narrow width barriers leading to stringent phase matching conditions with lattice band formation. In contrast to evanescently coupled lattice sites, the realisation of a scatterer lattice for macroscopic matter-wave fluids has remained elusive. Here, we implement a system of exciton-polariton condensates in a non-Hermitian Lieb lattice of scatterer potentials. By fine tuning the lattice parameters, we reveal a nonequilibrium phase transition between distinct regimes of polariton condensation: a scatterer lattice of gain guided polaritons condensing on the lattice potential maxima, and trapped polaritons condensing in the potential minima. Our results pave the way towards unexplored physics of non-Hermitian fluids in non-stationary mixtures of confined and freely expanding waves.
Polariton, polariton condensate, Microcavity, Artificial lattices, Light-matter interaction, optical pumping
2041-1723
Alyatkin, Sergey
485bddd5-8eb7-4045-911b-86b0d401bdd4
Sigurdsson, Helgi
c6380293-fe97-4fd0-a819-cf35721d4e5d
Askitopoulos, Alexis
f5793606-9831-4b09-a148-7710fbe4d08b
Toepfer, Julian, Dominic
f3e89749-2912-4907-b712-6052b732dfb1
Lagoudakis, Pavlos
ea50c228-f006-4edf-8459-60015d961bbf
Alyatkin, Sergey
485bddd5-8eb7-4045-911b-86b0d401bdd4
Sigurdsson, Helgi
c6380293-fe97-4fd0-a819-cf35721d4e5d
Askitopoulos, Alexis
f5793606-9831-4b09-a148-7710fbe4d08b
Toepfer, Julian, Dominic
f3e89749-2912-4907-b712-6052b732dfb1
Lagoudakis, Pavlos
ea50c228-f006-4edf-8459-60015d961bbf

Alyatkin, Sergey, Sigurdsson, Helgi, Askitopoulos, Alexis, Toepfer, Julian, Dominic and Lagoudakis, Pavlos (2021) Quantum fluids of light in all-optical scatterer lattices. Nature Communications, 12 (1), [5571]. (doi:10.1038/s41467-021-25845-4).

Record type: Article

Abstract

One of the recently established paradigms in condensed matter physics is examining a system's behaviour in artificial potentials, giving insight into phenomena of quantum fluids in hard-to-reach settings. A prominent example is the matter-wave scatterer lattice, where high energy matter waves undergo transmission and reflection through narrow width barriers leading to stringent phase matching conditions with lattice band formation. In contrast to evanescently coupled lattice sites, the realisation of a scatterer lattice for macroscopic matter-wave fluids has remained elusive. Here, we implement a system of exciton-polariton condensates in a non-Hermitian Lieb lattice of scatterer potentials. By fine tuning the lattice parameters, we reveal a nonequilibrium phase transition between distinct regimes of polariton condensation: a scatterer lattice of gain guided polaritons condensing on the lattice potential maxima, and trapped polaritons condensing in the potential minima. Our results pave the way towards unexplored physics of non-Hermitian fluids in non-stationary mixtures of confined and freely expanding waves.

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Accepted/In Press date: 11 August 2021
Published date: 22 September 2021
Keywords: Polariton, polariton condensate, Microcavity, Artificial lattices, Light-matter interaction, optical pumping

Identifiers

Local EPrints ID: 451768
URI: http://eprints.soton.ac.uk/id/eprint/451768
ISSN: 2041-1723
PURE UUID: e2259fcd-4948-4e7a-bfb4-84a55300d009
ORCID for Helgi Sigurdsson: ORCID iD orcid.org/0000-0002-4156-4414
ORCID for Julian, Dominic Toepfer: ORCID iD orcid.org/0000-0002-4928-5540
ORCID for Pavlos Lagoudakis: ORCID iD orcid.org/0000-0002-3557-5299

Catalogue record

Date deposited: 26 Oct 2021 16:32
Last modified: 27 Oct 2021 01:58

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Contributors

Author: Sergey Alyatkin
Author: Alexis Askitopoulos
Author: Julian, Dominic Toepfer ORCID iD

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