Projects per year
Abstract
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.
Original language | English |
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Article number | 8762 |
Journal | Nature Communications |
Volume | 15 |
Issue number | 1 |
DOIs | |
Publication status | Published - Dec 2024 |
MoE publication type | A1 Journal article-refereed |
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Dive into the research topics of 'Moiré-engineered light-matter interactions in MoS2/WSe2 heterobilayers at room temperature'. Together they form a unique fingerprint.Datasets
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Moiré-engineered light-matter interactions in MoS2/WSe2 heterobilayers at room temperature
Malić, E. (Creator), Stenger, N. (Contributor), Brem, S. (Contributor), Xiao, S. (Contributor), Fang, H. (Contributor), Wubs, M. (Contributor), Kalaboukhov, A. S. (Contributor), Hagel, J. (Contributor), Fischer, M. V. (Contributor), Zhang, Y. (Contributor), Sun, Z. (Contributor), Liu, Y. (Contributor), Lin, Q. (Contributor) & Li, J. (Contributor), Zenodo, 2 Sept 2024
DOI: 10.5281/zenodo.13629283, https://zenodo.org/records/13629284
Dataset
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BRIGHT: Bioottisten vahinkojen kartoitus erittäin laajan spektrialueen LiDAR:illa kestävää metsänkasvua varten
Sun, Z. (Principal investigator), Cui, X. (Project Member), Shang, N. (Project Member), Tammela, J. (Project Member), Tian, R. (Project Member), Huang, Y. (Project Member), Ning, Z. (Project Member), Zhou, Y. (Project Member), Bouzari, F. (Project Member), Fang, R. (Project Member), Khalid, F. (Project Member), Lin, Y. (Project Member) & Pajunpää, T. (Project Member)
EU The Recovery and Resilience Facility (RRF), Suomen Akatemia
01/01/2023 → 31/12/2025
Project: Academy of Finland: Other research funding
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Bio-Base: Biomaterial-based photonics and optoelectronics for sustainable ICT systems
Sun, Z. (Principal investigator), Ali, F. (Project Member), Shang, N. (Project Member), Sharma, P. (Project Member), Ning, Z. (Project Member), Xing, J. (Project Member), Kaaripuro, H. (Project Member), Pajunpää, T. (Project Member) & Zhou, Y. (Project Member)
01/01/2023 → 31/12/2025
Project: Academy of Finland: Other research funding
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-: Atomically-engineered nonlinear photonics with two-dimensional layered superlattices.
Sun, Z. (Principal investigator), Varjamo, S.-T. (Project Member), Wang, Y. (Project Member), Pelgrin, V. (Project Member), Wang, Y. (Project Member), Yoon, H. H. (Project Member), Das, S. (Project Member), Huang, Y. (Project Member), Liapis, A. (Project Member), Dai, Y. (Project Member), Mohsen, A. (Project Member), Nigmatulin, F. (Project Member), Uddin, M. (Project Member), Du, M. (Project Member), Zhang, Y. (Project Member), Arias, J. C. (Project Member), Lin, Y. (Project Member), Pajunpää, T. (Project Member), Turunen, M. (Project Member), Cui, X. (Project Member), Xing, J. (Project Member), Cheng, X. (Project Member), Kaaripuro, H. (Project Member) & Edwards, C. (Project Member)
01/09/2019 → 31/08/2025
Project: EU: ERC grants