Giant effective Zeeman splitting in a monolayer semiconductor realized by spin-selective strong light-matter coupling
| Autor: | T. P. Lyons, D. J. Gillard, C. Leblanc, J. Puebla, D. D. Solnyshkov, L. Klompmaker, I. A. Akimov, C. Louca, P. Muduli, A. Genco, M. Bayer, Y. Otani, G. Malpuech, A. I. Tartakovskii |
|---|---|
| Přispěvatelé: | Department of Physics and Astronomy [Sheffield], University of Sheffield [Sheffield], Theoretical Research Division [RIKEN, Japon] (RIKEN RNC), RIKEN Nishina Center for Accelerator-Based Science [Wako] (RIKEN RNC), RIKEN - Institute of Physical and Chemical Research [Japon] (RIKEN)-RIKEN - Institute of Physical and Chemical Research [Japon] (RIKEN), Institut Pascal (IP), Centre National de la Recherche Scientifique (CNRS)-Université Clermont Auvergne (UCA)-Institut national polytechnique Clermont Auvergne (INP Clermont Auvergne), Université Clermont Auvergne (UCA)-Université Clermont Auvergne (UCA), Institut Universitaire de France (IUF), Ministère de l'Education nationale, de l’Enseignement supérieur et de la Recherche (M.E.N.E.S.R.), Experimentelle Physik 2, Technische Universität Dortmund [Dortmund] (TU), A.F. Ioffe Physical-Technical Institute, Russian Academy of Sciences [Moscow] (RAS), Institute for Solid State Physics [Tokyo] (ISSP), The University of Tokyo (UTokyo), Department of Physics, Indian Institute of Technology Madras, Chennai, Tamil Nadu 600036 |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
[PHYS]Physics [physics]
Microresonators Optical properties and devices Condensed Matter - Mesoscale and Nanoscale Physics Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Polaritons FOS: Physical sciences Physics::Optics Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials |
| Zdroj: | Nature Photonics Nature Photonics, 2022, 16 (9), pp.632-636. ⟨10.1038/s41566-022-01025-8⟩ |
| ISSN: | 1749-4885 1749-4893 |
| DOI: | 10.1038/s41566-022-01025-8⟩ |
| Popis: | International audience; Strong coupling between light and the fundamental excitations of a two-dimensional electron gas (2DEG) is of foundational importance both to pure physics and to the understanding and development of future photonic nanotechnologies1,2,3,4,5,6,7. Here we study the relationship between spin polarization of a 2DEG in a monolayer semiconductor, MoSe2, and light–matter interactions modified by a zero-dimensional optical microcavity. We find pronounced spin-susceptibility of the 2DEG to simultaneously enhance and suppress trion-polariton formation in opposite photon helicities. This leads to observation of a giant effective valley Zeeman splitting for trion-polaritons (g-factor of >20), exceeding the purely trionic splitting by over five times. Going further, we observe clear effective optical nonlinearity arising from the highly nonlinear behaviour of the valley-specific strong light–matter coupling regime, and allowing all-optical tuning of the polaritonic Zeeman splitting from 4 meV to >10 meV. Our experiments lay the groundwork for engineering topological phases with true unidirectionality in monolayer semiconductors, accompanied by giant effective photonic nonlinearities rooted in many-body exciton–electron correlations. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink