TY - JOUR
T1 - Spatial coherence of room-temperature monolayer WSe2 exciton-polaritons in a trap
AU - Shan, Hangyong
AU - Lackner, Lukas
AU - Han, Bo
AU - Sedov, Evgeny
AU - Rupprecht, Christoph
AU - Knopf, Heiko
AU - Eilenberger, Falk
AU - Beierlein, Johannes
AU - Kunte, Nils
AU - Esmann, Martin
AU - Yumigeta, Kentaro
AU - Watanabe, Kenji
AU - Taniguchi, Takashi
AU - Klembt, Sebastian
AU - Höfling, Sven
AU - Kavokin, Alexey V.
AU - Tongay, Sefaattin
AU - Schneider, Christian
AU - Antón-Solanas, Carlos
N1 - Funding Information:
The authors gratefully acknowledge funding by the State of Lower Saxony. Funding provided by the European Research Council (ERC project 679288, unlimit-2D) is acknowledged. S.T. acknowledges funding from NSF DMR 1955889, DMR 1933214, and 1904716. S.T. also acknowledges DOE-SC0020653, DMR 2111812, and ECCS 2052527 for material development and integration. A.V.K. acknowledges Westlake University (Project No. 041020100118) and the 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) and JSPS KAKENHI (Grant Numbers JP19H05790 and JP20H00354). H.S. acknowledges the Sino-Germany (CSC-DAAD) Postdoctoral Scholarship Program from China Scholarship Council and the German Academic Exchange Service. A.V.K. acknowledges the Royal Society International Exchange Grant No. IEC\R2\202148. S.K. and S.H. acknowledge the Deutsche For-schungsgemeinschaft (DFG, German Research Foundation)–INST 93/932-1 FUGG. M.E. acknowledges funding by the University of Oldenburg through a Carl-von-Ossietzky fellowship. H.S., J.B., and C.A.-S. acknowledge Tobias Huber for his assistance in the magnetic field experiments.
Publisher Copyright:
© 2021, The Author(s).
PY - 2021/12/1
Y1 - 2021/12/1
N2 - The emergence of spatial and temporal coherence of light emitted from solid-state systems is a fundamental phenomenon intrinsically aligned with the control of light-matter coupling. It is canonical for laser oscillation, emerges in the superradiance of collective emitters, and has been investigated in bosonic condensates of thermalized light, as well as exciton-polaritons. Our room temperature experiments show the strong light-matter coupling between microcavity photons and excitons in atomically thin WSe2. We evidence the density-dependent expansion of spatial and temporal coherence of the emitted light from the spatially confined system ground-state, which is accompanied by a threshold-like response of the emitted light intensity. Additionally, valley-physics is manifested in the presence of an external magnetic field, which allows us to manipulate K and K’ polaritons via the valley-Zeeman-effect. Our findings validate the potential of atomically thin crystals as versatile components of coherent light-sources, and in valleytronic applications at room temperature.
AB - The emergence of spatial and temporal coherence of light emitted from solid-state systems is a fundamental phenomenon intrinsically aligned with the control of light-matter coupling. It is canonical for laser oscillation, emerges in the superradiance of collective emitters, and has been investigated in bosonic condensates of thermalized light, as well as exciton-polaritons. Our room temperature experiments show the strong light-matter coupling between microcavity photons and excitons in atomically thin WSe2. We evidence the density-dependent expansion of spatial and temporal coherence of the emitted light from the spatially confined system ground-state, which is accompanied by a threshold-like response of the emitted light intensity. Additionally, valley-physics is manifested in the presence of an external magnetic field, which allows us to manipulate K and K’ polaritons via the valley-Zeeman-effect. Our findings validate the potential of atomically thin crystals as versatile components of coherent light-sources, and in valleytronic applications at room temperature.
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U2 - 10.1038/s41467-021-26715-9
DO - 10.1038/s41467-021-26715-9
M3 - Article
C2 - 34737328
AN - SCOPUS:85118474302
SN - 2041-1723
VL - 12
JO - Nature communications
JF - Nature communications
IS - 1
M1 - 6406
ER -