Bosonic condensation and disorder-induced localization in a flat band

F. Baboux; L. Ge; T. Jacqmin; M. Biondi; E. Galopin; A. Lemaître; L. Le Gratiet; I. Sagnes; S. Schmidt; H. E. Türeci; A. Amo; J. Bloch

doi:10.1103/PhysRevLett.116.066402

Bosonic condensation and disorder-induced localization in a flat band

F. Baboux, L. Ge, T. Jacqmin, M. Biondi, E. Galopin, A. Lemaître, L. Le Gratiet, I. Sagnes, S. Schmidt, H. E. Türeci, A. Amo, J. Bloch

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232 Scopus citations

Abstract

We report on the engineering of a nondispersive (flat) energy band in a geometrically frustrated lattice of micropillar optical cavities. By taking advantage of the non-Hermitian nature of our system, we achieve bosonic condensation of exciton polaritons into the flat band. Because of the infinite effective mass in such a band, the condensate is highly sensitive to disorder and fragments into localized modes reflecting the elementary eigenstates produced by geometric frustration. This realization offers a novel approach to studying coherent phases of light and matter under the controlled interplay of frustration, interactions, and dissipation.

Original language	English (US)
Article number	066402
Journal	Physical review letters
Volume	116
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevLett.116.066402
State	Published - Feb 12 2016

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

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10.1103/PhysRevLett.116.066402

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title = "Bosonic condensation and disorder-induced localization in a flat band",

abstract = "We report on the engineering of a nondispersive (flat) energy band in a geometrically frustrated lattice of micropillar optical cavities. By taking advantage of the non-Hermitian nature of our system, we achieve bosonic condensation of exciton polaritons into the flat band. Because of the infinite effective mass in such a band, the condensate is highly sensitive to disorder and fragments into localized modes reflecting the elementary eigenstates produced by geometric frustration. This realization offers a novel approach to studying coherent phases of light and matter under the controlled interplay of frustration, interactions, and dissipation.",

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AU - Baboux, F.

AU - Ge, L.

AU - Jacqmin, T.

AU - Biondi, M.

AU - Galopin, E.

AU - Lemaître, A.

AU - Le Gratiet, L.

AU - Sagnes, I.

AU - Schmidt, S.

AU - Türeci, H. E.

AU - Amo, A.

AU - Bloch, J.

PY - 2016/2/12

Y1 - 2016/2/12

N2 - We report on the engineering of a nondispersive (flat) energy band in a geometrically frustrated lattice of micropillar optical cavities. By taking advantage of the non-Hermitian nature of our system, we achieve bosonic condensation of exciton polaritons into the flat band. Because of the infinite effective mass in such a band, the condensate is highly sensitive to disorder and fragments into localized modes reflecting the elementary eigenstates produced by geometric frustration. This realization offers a novel approach to studying coherent phases of light and matter under the controlled interplay of frustration, interactions, and dissipation.

AB - We report on the engineering of a nondispersive (flat) energy band in a geometrically frustrated lattice of micropillar optical cavities. By taking advantage of the non-Hermitian nature of our system, we achieve bosonic condensation of exciton polaritons into the flat band. Because of the infinite effective mass in such a band, the condensate is highly sensitive to disorder and fragments into localized modes reflecting the elementary eigenstates produced by geometric frustration. This realization offers a novel approach to studying coherent phases of light and matter under the controlled interplay of frustration, interactions, and dissipation.

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Bosonic condensation and disorder-induced localization in a flat band

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