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Superradiant Emission from Coherent Excitons in van Der Waals Heterostructures
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SYSNO ASEP 0542516 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Superradiant Emission from Coherent Excitons in van Der Waals Heterostructures Author(s) Haider, Golam (UFCH-W) ORCID, RID
Sampathkumar, Krishna (UFCH-W) ORCID, RID
Verhagen, T. (CZ)
Nádvorník, L. (CZ)
Farjana, Jaishmin Sonia (UFCH-W) ORCID, RID
Valeš, Václav (UFCH-W) RID, ORCID
Sýkora, Jan (UFCH-W) RID
Kapusta, Peter (UFCH-W) RID, ORCID
Němec, P. (CZ)
Hof, Martin (UFCH-W) RID, ORCID
Frank, Otakar (UFCH-W) RID, ORCID
Chen, Y. F. (TW)
Vejpravová, J. (CZ)
Kalbáč, Martin (UFCH-W) RID, ORCIDArticle number 2102196 Source Title Advanced Functional Materials - ISSN 1616-301X
Roč. 2021, MAY 2021 (2021)Number of pages 12 s. Language eng - English Country DE - Germany Keywords light emission ; quantum ; layer ; laser ; absorption ; radiation ; emitters ; energy ; coherent excitons ; low temperature ; photon correlation ; superradiance ; van‐ ; der Waals heterostructures Subject RIV CF - Physical ; Theoretical Chemistry OECD category Physical chemistry R&D Projects GX20-08633X GA ČR - Czech Science Foundation (CSF) GX19-26854X GA ČR - Czech Science Foundation (CSF) Method of publishing Open access Institutional support UFCH-W - RVO:61388955 UT WOS 000649260900001 EID SCOPUS 85105433687 DOI 10.1002/adfm.202102196 Annotation Recent advancements in isolation and stacking of layered van der Waals materials have created an unprecedented paradigm for demonstrating varieties of 2D quantum materials. Rationally designed van der Waals heterostructures composed of monolayer transition-metal dichalcogenides (TMDs) and few-layer hBN show several unique optoelectronic features driven by correlations. However, entangled superradiant excitonic species in such systems have not been observed before. In this report, it is demonstrated that strong suppression of phonon population at low temperature results in a formation of a coherent excitonic-dipoles ensemble in the heterostructure, and the collective oscillation of those dipoles stimulates a robust phase synchronized ultra-narrow band superradiant emission even at extremely low pumping intensity. Such emitters are in high demand for a multitude of applications, including fundamental research on many-body correlations and other state-of-the-art technologies. This timely demonstration paves the way for further exploration of ultralow-threshold quantum-emitting devices with unmatched design freedom and spectral tunability. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2022 Electronic address http://hdl.handle.net/11104/0319912
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