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 - 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 -