Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
Optical valley Hall effect for highly valley-coherent exciton-polaritons in an atomically thin semiconductor. / Lundt, Nils; Dusanowski, Łukasz; Sedov, Evgeny; Stepanov, Petr; Glazov, Mikhail M.; Klembt, Sebastian; Klaas, Martin; Beierlein, Johannes; Qin, Ying; Tongay, Sefaattin; Richard, Maxime; Kavokin, Alexey V.; Höfling, Sven; Schneider, Christian.
в: Nature Nanotechnology, Том 14, № 8, 01.08.2019, стр. 770-775.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Optical valley Hall effect for highly valley-coherent exciton-polaritons in an atomically thin semiconductor
AU - Lundt, Nils
AU - Dusanowski, Łukasz
AU - Sedov, Evgeny
AU - Stepanov, Petr
AU - Glazov, Mikhail M.
AU - Klembt, Sebastian
AU - Klaas, Martin
AU - Beierlein, Johannes
AU - Qin, Ying
AU - Tongay, Sefaattin
AU - Richard, Maxime
AU - Kavokin, Alexey V.
AU - Höfling, Sven
AU - Schneider, Christian
PY - 2019/8/1
Y1 - 2019/8/1
N2 - Spin–orbit coupling is a fundamental mechanism that connects the spin of a charge carrier with its momentum. In the optical domain, an analogous synthetic spin–orbit coupling is accessible by engineering optical anisotropies in photonic materials. Both yield the possibility of creating devices that directly harness spin and polarization as information carriers. Atomically thin transition metal dichalcogenides promise intrinsic spin-valley Hall features for free carriers, excitons and photons. Here we demonstrate spin- and valley-selective propagation of exciton-polaritons in a monolayer of MoSe2 that is strongly coupled to a microcavity photon mode. In a wire-like device we trace the flow and helicity of exciton-polaritons expanding along its channel. By exciting a coherent superposition of K and K′ tagged polaritons, we observe valley-selective expansion of the polariton cloud without either an external magnetic field or coherent Rayleigh scattering. The observed optical valley Hall effect occurs on a macroscopic scale, offering the potential for applications in spin-valley-locked photonic devices.
AB - Spin–orbit coupling is a fundamental mechanism that connects the spin of a charge carrier with its momentum. In the optical domain, an analogous synthetic spin–orbit coupling is accessible by engineering optical anisotropies in photonic materials. Both yield the possibility of creating devices that directly harness spin and polarization as information carriers. Atomically thin transition metal dichalcogenides promise intrinsic spin-valley Hall features for free carriers, excitons and photons. Here we demonstrate spin- and valley-selective propagation of exciton-polaritons in a monolayer of MoSe2 that is strongly coupled to a microcavity photon mode. In a wire-like device we trace the flow and helicity of exciton-polaritons expanding along its channel. By exciting a coherent superposition of K and K′ tagged polaritons, we observe valley-selective expansion of the polariton cloud without either an external magnetic field or coherent Rayleigh scattering. The observed optical valley Hall effect occurs on a macroscopic scale, offering the potential for applications in spin-valley-locked photonic devices.
KW - SPIN
KW - DYNAMICS
KW - POLARIZATION
KW - GENERATION
KW - SCATTERING
UR - http://www.scopus.com/inward/record.url?scp=85070198041&partnerID=8YFLogxK
U2 - 10.1038/s41565-019-0492-0
DO - 10.1038/s41565-019-0492-0
M3 - Article
C2 - 31332345
AN - SCOPUS:85070198041
VL - 14
SP - 770
EP - 775
JO - Nature Nanotechnology
JF - Nature Nanotechnology
SN - 1748-3387
IS - 8
ER -
ID: 49044573