Moiré-engineered light-matter interactions in MoS2 /WSe2 heterobilayers at room temperature
Artikel i vetenskaplig tidskrift, 2024
Moiré superlattices in van der Waals heterostructures represent a highly tunable quantum system, attracting substantial interest in both many-body physics and device applications. However, the influence of the moiré potential on light-matter interactions at room temperature has remained largely unexplored. In our study, we demonstrate that the moiré potential in MoS2/WSe2 heterobilayers facilitates the localization of interlayer exciton (IX) at room temperature. By performing reflection contrast spectroscopy, we demonstrate the importance of atomic reconstruction in modifying intralayer excitons, supported by the atomic force microscopy experiment. When decreasing the twist angle, we observe that the IX lifetime becomes longer and light emission gets enhanced, indicating that non-radiative decay channels such as defects are suppressed by the moiré potential. Moreover, through the integration of moiré superlattices with silicon single-mode cavities, we find that the devices employing moiré-trapped IXs exhibit a significantly lower threshold, one order of magnitude smaller compared to the device utilizing delocalized IXs. These findings not only encourage the exploration of many-body physics in moiré superlattices at elevated temperatures but also pave the way for leveraging these artificial quantum materials in photonic and optoelectronic applications.
Författare
Qiaoling Lin
Danmarks Tekniske Universitet (DTU)
Hanlin Fang
Danmarks Tekniske Universitet (DTU)
Chalmers, Mikroteknologi och nanovetenskap, Kvantteknologi
Alexei Kalaboukhov
Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik
Yuanda Liu
Agency for Science, Technology and Research (A*STAR)
Yi Zhang
Aalto-Yliopisto
Moritz Fischer
Danmarks Tekniske Universitet (DTU)
Juntao Li
Sun Yat-Sen University
Joakim Hagel
Chalmers, Fysik, Kondenserad materie- och materialteori
Samuel Brem
Philipps-Universität Marburg
Ermin Malic
Philipps-Universität Marburg
Nicolas Stenger
Danmarks Tekniske Universitet (DTU)
Zhipei Sun
Aalto-Yliopisto
Martijn Wubs
Danmarks Tekniske Universitet (DTU)
Sanshui Xiao
Danmarks Tekniske Universitet (DTU)
Nature Communications
2041-1723 (ISSN) 20411723 (eISSN)
Vol. 15 1 8762Ämneskategorier
Atom- och molekylfysik och optik
Annan fysik
Den kondenserade materiens fysik
DOI
10.1038/s41467-024-53083-x
PubMed
39384821