Lasing of moiré trapped MoSe 2 /WSe 2 interlayer excitons coupled to a nanocavity.

Autor: Qian C; Walter Schottky Institut and TUM School of Natural Science, Technische Universität München, Am Coulombwall 4, 85748 Garching, Germany.; Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.; School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China., Troue M; Walter Schottky Institut and TUM School of Natural Science, Technische Universität München, Am Coulombwall 4, 85748 Garching, Germany.; Munich Center for Quantum Science and Technology (MCQST), Schellingstr. 4, 80799 Munich, Germany., Figueiredo J; Walter Schottky Institut and TUM School of Natural Science, Technische Universität München, Am Coulombwall 4, 85748 Garching, Germany.; Munich Center for Quantum Science and Technology (MCQST), Schellingstr. 4, 80799 Munich, Germany., Soubelet P; Walter Schottky Institut and TUM School of Natural Science, Technische Universität München, Am Coulombwall 4, 85748 Garching, Germany., Villafañe V; Walter Schottky Institut and TUM School of Natural Science, Technische Universität München, Am Coulombwall 4, 85748 Garching, Germany., Beierlein J; Julius-Maximilians-Universität Würzburg, Physikalisches Institut and Würzburg-Dresden Cluster of Excellence ct.qmat, Lehrstuhl für Technische Physik, Am Hubland, 97074 Würzburg, Germany., Klembt S; Julius-Maximilians-Universität Würzburg, Physikalisches Institut and Würzburg-Dresden Cluster of Excellence ct.qmat, Lehrstuhl für Technische Physik, Am Hubland, 97074 Würzburg, Germany., Stier AV; Walter Schottky Institut and TUM School of Natural Science, Technische Universität München, Am Coulombwall 4, 85748 Garching, Germany., Höfling S; Julius-Maximilians-Universität Würzburg, Physikalisches Institut and Würzburg-Dresden Cluster of Excellence ct.qmat, Lehrstuhl für Technische Physik, Am Hubland, 97074 Würzburg, Germany., Holleitner AW; Walter Schottky Institut and TUM School of Natural Science, Technische Universität München, Am Coulombwall 4, 85748 Garching, Germany.; Munich Center for Quantum Science and Technology (MCQST), Schellingstr. 4, 80799 Munich, Germany., Finley JJ; Walter Schottky Institut and TUM School of Natural Science, Technische Universität München, Am Coulombwall 4, 85748 Garching, Germany.
Jazyk: angličtina
Zdroj: Science advances [Sci Adv] 2024 Jan 12; Vol. 10 (2), pp. eadk6359. Date of Electronic Publication: 2024 Jan 10.
DOI: 10.1126/sciadv.adk6359
Abstrakt: We report lasing of moiré trapped interlayer excitons (IXs) by integrating a pristine hBN-encapsulated MoSe 2 /WSe 2 heterobilayer into a high- Q (>10 4 ) nanophotonic cavity. We control the cavity-IX detuning using a magnetic field and measure their dipolar coupling strength to be 78 ± 4 micro-electron volts, fully consistent with the 82 micro-electron volts predicted by theory. The emission from the cavity mode shows clear threshold-like behavior as the transition is tuned into resonance with the cavity. We observe a superlinear power dependence accompanied by a narrowing of the linewidth as the distinct features of lasing. The onset and prominence of these threshold-like behaviors are pronounced at resonance while weak off-resonance. Our results show that a lasing transition can be induced in interacting moiré IXs with macroscopic coherence extending over the length scale of the cavity mode. Such systems raise interesting perspectives for low-power switching and synaptic nanophotonic devices using two-dimensional materials.
Databáze: MEDLINE
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