Correlated fluorescence blinking in two-dimensional semiconductor heterostructures

Xu, Weigao; Liu, Weiwei; Schmidt, Jan; Zhao, Weijie; Lu, Xin; Raab, Timo; Diederichs, Carole; Gao, Weibo; Seletskiy, Denis V.; Xiong, Qihua

Correlated fluorescence blinking in two-dimensional semiconductor heterostructures

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Datum

2016

Autor:innen

Xu, Weigao

Liu, Weiwei

Schmidt, Jan

Zhao, Weijie

Lu, Xin

Raab, Timo

Diederichs, Carole

Gao, Weibo

Seletskiy, Denis V.

Xiong, Qihua

DOI (zitierfähiger Link)

https://doi.org/10.1038/nature20601

Sammlungen

Physik
Zukunftskolleg

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Nature. 2016, 541(7635), pp. 62-67. ISSN 0028-0836. eISSN 1476-4687. Available under: doi: 10.1038/nature20601

Zusammenfassung

'Blinking', or 'fluorescence intermittency', refers to a random switching between 'ON' (bright) and 'OFF' (dark) states of an emitter; it has been studied widely in zero-dimensional quantum dots and molecules, and scarcely in one-dimensional systems. A generally accepted mechanism for blinking in quantum dots involves random switching between neutral and charged states (or is accompanied by fluctuations in charge-carrier traps), which substantially alters the dynamics of radiative and non-radiative decay. Here, we uncover a new type of blinking effect in vertically stacked, two-dimensional semiconductor heterostructures, which consist of two distinct monolayers of transition metal dichalcogenides (TMDs) that are weakly coupled by van der Waals forces. Unlike zero-dimensional or one-dimensional systems, two-dimensional TMD heterostructures show a correlated blinking effect, comprising randomly switching bright, neutral and dark states. Fluorescence cross-correlation spectroscopy analyses show that a bright state occurring in one monolayer will simultaneously lead to a dark state in the other monolayer, owing to an intermittent interlayer carrier-transfer process. Our findings suggest that bilayer van der Waals heterostructures provide unique platforms for the study of charge-transfer dynamics and non-equilibrium-state physics, and could see application as correlated light emitters in quantum technology.

Fachgebiet (DDC)

530 Physik

Zitieren

ISO 690

XU, Weigao, Weiwei LIU, Jan SCHMIDT, Weijie ZHAO, Xin LU, Timo RAAB, Carole DIEDERICHS, Weibo GAO, Denis V. SELETSKIY, Qihua XIONG, 2016. Correlated fluorescence blinking in two-dimensional semiconductor heterostructures. In: Nature. 2016, 541(7635), pp. 62-67. ISSN 0028-0836. eISSN 1476-4687. Available under: doi: 10.1038/nature20601

BibTex

@article{Xu2016Corre-38709,
  year={2016},
  doi={10.1038/nature20601},
  title={Correlated fluorescence blinking in two-dimensional semiconductor heterostructures},
  number={7635},
  volume={541},
  issn={0028-0836},
  journal={Nature},
  pages={62--67},
  author={Xu, Weigao and Liu, Weiwei and Schmidt, Jan and Zhao, Weijie and Lu, Xin and Raab, Timo and Diederichs, Carole and Gao, Weibo and Seletskiy, Denis V. and Xiong, Qihua}
}

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Universitätsbibliographie

Ja