TY - JOUR
T1 - Bosonic condensation of exciton–polaritons in an atomically thin crystal
AU - Anton-Solanas, Carlos
AU - Waldherr, Maximilian
AU - Klaas, Martin
AU - Suchomel, Holger
AU - Harder, Tristan H.
AU - Cai, Hui
AU - Sedov, Evgeny
AU - Klembt, Sebastian
AU - Kavokin, Alexey V.
AU - Tongay, Sefaattin
AU - Watanabe, Kenji
AU - Taniguchi, Takashi
AU - Höfling, Sven
AU - Schneider, Christian
N1 - This work was funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)–INST 93/932-1 FUGG. The authors gratefully acknowledge funding by the State of Bavaria and Lower Saxony. Funding provided by the European Research Council (ERC project 679288, unlimit-2D) is acknowledged. T.H.H., S.K. and S.H. acknowledge financial support by DFG through the Würzburg-Dresden Cluster of Excellence on Complexity and Topology in Quantum Matter “ct.qmat” (EXC 2147, project‐id 390858490). T.H.H. acknowledges funding by the doctoral training program ‘Elitenetzwerk Bayern’ and support by the German Academic Scholarship Foundation. S.T. acknowledges funding from NSF DMR 1955889, DMR 2111812, DMR 1933214 and 1904716. S.T. also acknowledges DOE-SC0020653. E.S. and A.V.K. acknowledge Westlake University (project number 041020100118) and Program 2018R01002 funded by the Leading Innovative and Entrepreneur Team Introduction Program of Zhejiang. K.W. and T.T. acknowledge support from the Elemental Strategy Initiative conducted by the MEXT, Japan, grant number JPMXP0112101001, JSPS KAKENHI grant number JP20H00354 and the CREST (JPMJCR15F3), JST. A.V.K. acknowledges the St Petersburg State University for research grant number 73031758.
PY - 2021/5/6
Y1 - 2021/5/6
N2 - The emergence of two-dimensional crystals has revolutionized modern
solid-state physics. From a fundamental point of view, the enhancement
of charge carrier correlations has sparked much research activity in the
transport and quantum optics communities. One of the most intriguing
effects, in this regard, is the bosonic condensation and spontaneous
coherence of many-particle complexes. Here we find compelling evidence
of bosonic condensation of exciton–polaritons emerging from an
atomically thin crystal of MoSe2 embedded in a dielectric
microcavity under optical pumping at cryogenic temperatures. The
formation of the condensate manifests itself in a sudden increase of
luminescence intensity in a threshold-like manner, and a notable
spin-polarizability in an externally applied magnetic field. Spatial
coherence is mapped out via highly resolved real-space interferometry,
revealing a spatially extended condensate. Our device represents a
decisive step towards the implementation of coherent light-sources based
on atomically thin crystals, as well as non-linear, valleytronic
coherent devices.
AB - The emergence of two-dimensional crystals has revolutionized modern
solid-state physics. From a fundamental point of view, the enhancement
of charge carrier correlations has sparked much research activity in the
transport and quantum optics communities. One of the most intriguing
effects, in this regard, is the bosonic condensation and spontaneous
coherence of many-particle complexes. Here we find compelling evidence
of bosonic condensation of exciton–polaritons emerging from an
atomically thin crystal of MoSe2 embedded in a dielectric
microcavity under optical pumping at cryogenic temperatures. The
formation of the condensate manifests itself in a sudden increase of
luminescence intensity in a threshold-like manner, and a notable
spin-polarizability in an externally applied magnetic field. Spatial
coherence is mapped out via highly resolved real-space interferometry,
revealing a spatially extended condensate. Our device represents a
decisive step towards the implementation of coherent light-sources based
on atomically thin crystals, as well as non-linear, valleytronic
coherent devices.
U2 - 10.1038/s41563-021-01000-8
DO - 10.1038/s41563-021-01000-8
M3 - Article
SN - 1476-4660
JO - Nature Materials
JF - Nature Materials
ER -