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Visualising Berry phase and diabolical points in a quantum exciton-polariton billiard

E. Estrecho
T. Gao
E. A. Ostrovskaya
ResearchOpen Access25 Nov 2016
Scientific Reports

Volume: 6, P: 1-7
Negative-mass exciton polaritons induced by dissipative light-matter coupling in an atomically thin semiconductor

Dissipation and losses are normally perceived as detrimental to the performance of electronic and photonic devices. Here, the authors demonstrate dissipative coupling between excitons and photons in optical microcavities which they then use to create polaritons with a negative effective mass.

M. Wurdack
T. Yun
E. Estrecho
ResearchOpen Access23 Feb 2023
Nature Communications

Volume: 14, P: 1-7
Motional narrowing, ballistic transport, and trapping of room-temperature exciton polaritons in an atomically-thin semiconductor

Room-temperature exciton polaritons in a monolayer WS₂ are shown to display strong motional narrowing of the linewidth and enhanced first-order coherence. They can propagate for tens of micrometers while maintaining partial coherence, and display signatures of ballistic (dissipationless) transport.

M. Wurdack
E. Estrecho
E. A. Ostrovskaya
ResearchOpen Access10 Sept 2021
Nature Communications

Volume: 12, P: 1-8
Publisher Correction: Negative-mass exciton polaritons induced by dissipative light-matter coupling in an atomically thin semiconductor

M. Wurdack
T. Yun
E. Estrecho
Amendments and CorrectionsOpen Access02 Mar 2023
Nature Communications

Volume: 14, P: 1
Author Correction: Motional narrowing, ballistic transport, and trapping of room-temperature exciton polaritons in an atomically-thin semiconductor

M. Wurdack
E. Estrecho
E. A. Ostrovskaya
Amendments and CorrectionsOpen Access06 May 2022
Nature Communications

Volume: 13, P: 1
Single-shot condensation of exciton polaritons and the hole burning effect

The mechanism for exciton-polariton condensation in the presence of an incoherent reservoir has been long debated. Here the authors demonstrate the role of the spatial hole burning in condensation of long‐lived exciton polaritons by imaging the condensates in a single-shot excitation regime.

E. Estrecho
T. Gao
E. A. Ostrovskaya
ResearchOpen Access09 Aug 2018
Nature Communications

Volume: 9, P: 1-9
Publisher Correction: Single-shot condensation of exciton polaritons and the hole burning effect

E. Estrecho
T. Gao
E. A. Ostrovskaya
Amendments and CorrectionsOpen Access28 Aug 2018
Nature Communications

Volume: 9, P: 1
Coherence of a non-equilibrium polariton condensate across the interaction-mediated phase transition

Understanding phase transitions in open quantum systems is challenging. This work explores a driven-dissipative exciton polariton system undergoing an interaction-driven phase transition and reveals a relationship between the power-law decay of spatial coherence, the effective temperature of the system, and its coherent fraction, in surprising analogy to the conservative case.

P. Comaron
E. Estrecho
E. A. Ostrovskaya
ResearchOpen Access07 Mar 2025
Communications Physics

Volume: 8, P: 1-10
Observation of non-Hermitian degeneracies in a chaotic exciton-polariton billiard

In non-Hermitian systems, spectral degeneracies can arise that can cause unusual, counter-intuitive effects; here exciton-polaritons—hybrid light–matter particles—within a semiconductor microcavity are found to display non-trivial topological modal structure exclusive to such systems.

T. Gao
E. Estrecho
E. A. Ostrovskaya
Research12 Oct 2015
Nature

Volume: 526, P: 554-558

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