Research output: Contribution to journal › Article › peer-review
Observation of bosonic condensation in a hybrid monolayer MoSe2-GaAs microcavity. / Waldherr, Max; Lundt, Nils; Klaas, Martin; Betzold, Simon; Wurdack, Matthias; Baumann, Vasilij; Estrecho, Eliezer; Nalitov, Anton; Cherotchenko, Evgenia; Cai, Hui; Ostrovskaya, Elena A.; Kavokin, Alexey V.; Tongay, Sefaattin; Klembt, Sebastian; Höfling, Sven; Schneider, Christian.
In: Nature Communications, Vol. 9, No. 1, 3286, 16.08.2018.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - Observation of bosonic condensation in a hybrid monolayer MoSe2-GaAs microcavity
AU - Waldherr, Max
AU - Lundt, Nils
AU - Klaas, Martin
AU - Betzold, Simon
AU - Wurdack, Matthias
AU - Baumann, Vasilij
AU - Estrecho, Eliezer
AU - Nalitov, Anton
AU - Cherotchenko, Evgenia
AU - Cai, Hui
AU - Ostrovskaya, Elena A.
AU - Kavokin, Alexey V.
AU - Tongay, Sefaattin
AU - Klembt, Sebastian
AU - Höfling, Sven
AU - Schneider, Christian
PY - 2018/8/16
Y1 - 2018/8/16
N2 - Bosonic condensation belongs to the most intriguing phenomena in physics, and was mostly reserved for experiments with ultra-cold quantum gases. More recently, it became accessible in exciton-based solid-state systems at elevated temperatures. Here, we demonstrate bosonic condensation driven by excitons hosted in an atomically thin layer of MoSe2, strongly coupled to light in a solid-state resonator. The structure is operated in the regime of collective strong coupling between a Tamm-plasmon resonance, GaAs quantum well excitons, and two-dimensional excitons confined in the monolayer crystal. Polariton condensation in a monolayer crystal manifests by a superlinear increase of emission intensity from the hybrid polariton mode, its density-dependent blueshift, and a dramatic collapse of the emission linewidth, a hallmark of temporal coherence. Importantly, we observe a significant spin-polarization in the injected polariton condensate, a fingerprint for spin-valley locking in monolayer excitons. Our results pave the way towards highly nonlinear, coherent valleytronic devices and light sources.
AB - Bosonic condensation belongs to the most intriguing phenomena in physics, and was mostly reserved for experiments with ultra-cold quantum gases. More recently, it became accessible in exciton-based solid-state systems at elevated temperatures. Here, we demonstrate bosonic condensation driven by excitons hosted in an atomically thin layer of MoSe2, strongly coupled to light in a solid-state resonator. The structure is operated in the regime of collective strong coupling between a Tamm-plasmon resonance, GaAs quantum well excitons, and two-dimensional excitons confined in the monolayer crystal. Polariton condensation in a monolayer crystal manifests by a superlinear increase of emission intensity from the hybrid polariton mode, its density-dependent blueshift, and a dramatic collapse of the emission linewidth, a hallmark of temporal coherence. Importantly, we observe a significant spin-polarization in the injected polariton condensate, a fingerprint for spin-valley locking in monolayer excitons. Our results pave the way towards highly nonlinear, coherent valleytronic devices and light sources.
KW - BOSE-EINSTEIN CONDENSATION
KW - EXCITON-POLARITONS
KW - SEMICONDUCTOR
KW - MOS2
UR - http://www.scopus.com/inward/record.url?scp=85051676593&partnerID=8YFLogxK
UR - http://www.mendeley.com/research/observation-bosonic-condensation-hybrid-monolayer-mose2gaas-microcavity
U2 - 10.1038/s41467-018-05532-7
DO - 10.1038/s41467-018-05532-7
M3 - Article
C2 - 30115908
AN - SCOPUS:85051676593
VL - 9
JO - Nature Communications
JF - Nature Communications
SN - 2041-1723
IS - 1
M1 - 3286
ER -
ID: 36003891