Exciton-polaritons in van der Waals heterostructures embedded in tunable microcavities.
Dufferwiel, S., Schwarz, S., Withers, F. et al. (13 more authors)
(2015)
Exciton-polaritons in van der Waals heterostructures embedded in tunable microcavities.
Nature Communications, 6.
8579 .
ISSN 2041-1723
Abstract
Layered materials can be assembled vertically to fabricate a new class of van der Waals heterostructures a few atomic layers thick, compatible with a wide range of substrates and optoelectronic device geometries, enabling new strategies for control of light-matter coupling. Here, we incorporate molybdenum diselenide/hexagonal boron nitride (MoSe2/hBN) quantum wells in a tunable optical microcavity. Part-light-part-matter polariton eigenstates are observed as a result of the strong coupling between MoSe2 excitons and cavity photons, evidenced from a clear anticrossing between the neutral exciton and the cavity modes with a splitting of 20 meV for a single MoSe2 monolayer, enhanced to 29 meV in MoSe2/hBN/MoSe2 double-quantum wells. The splitting at resonance provides an estimate of the exciton radiative lifetime of 0.4 ps. Our results pave the way for room-temperature polaritonic devices based on multiple-quantum-well van der Waals heterostructures, where polariton condensation and electrical polariton injection through the incorporation of graphene contacts may be realized.
Metadata
Authors/Creators:
Dufferwiel, S.
Schwarz, S.
Withers, F.
Trichet, A.A.
Li, F.
Sich, M.
Del Pozo-Zamudio, O.
Clark, C.
Nalitov, A.
Solnyshkov, D.D.
Malpuech, G.
Novoselov, K.S.
Smith, J.M.
Skolnick, M.S.
Krizhanovskii, D.N.
Tartakovskii, A.I.
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