Photon superbunching in cathodoluminescence of excitons in WS2 monolayer

Saskia Fiedler; Sergii Morozov; Leonid Iliushyn; Sergejs Boroviks; Martin Thomaschewski; Jianfang Wang; Timothy J. Booth; Nicolas Stenger; Christian Wolff; N. Asger Mortensen

doi:10.1088/2053-1583/acbf66

Photon superbunching in cathodoluminescence of excitons in WS₂ monolayer

Saskia Fiedler
, Sergii Morozov
, Leonid Iliushyn
, Sergejs Boroviks
, Martin Thomaschewski
, Jianfang Wang
, Timothy J. Booth
, Nicolas Stenger
, Christian Wolff
, N. Asger Mortensen^*

^*Corresponding author for this work

Chinese University of Hong Kong
University of Southern Denmark

Research output: Contribution to journal › Journal article › Research › peer-review

213 Downloads (Orbit)

Abstract

Cathodoluminescence spectroscopy in conjunction with second-order auto-correlation measurements of g 2 ( τ ) allows to extensively study the synchronization of photon emitters in low-dimensional structures. Co-existing excitons in two-dimensional transition metal dichalcogenide monolayers provide a great source of identical photon emitters which can be simultaneously excited by an electron. Here, we demonstrate large photon bunching with g 2 ( 0 ) up to 156 ± 16 of a tungsten disulfide monolayer (WS₂), exhibiting a strong dependence on the electron-beam current. To further improve the excitation synchronization and the electron-emitter interaction, we show exemplary that the careful selection of a simple and compact geometry—a thin, monocrystalline gold nanodisk—can be used to realize a record-high bunching g 2 ( 0 ) of up to 2152 ± 236 . This approach to control the electron excitation of excitons in a WS₂ monolayer allows for the synchronization of photon emitters in an ensemble, which is important to further advance light information and computing technologies.

Original language	English
Article number	021002
Journal	2D materials
Volume	10
Issue number	2
Number of pages	8
ISSN	2053-1583
DOIs	https://doi.org/10.1088/2053-1583/acbf66
Publication status	Published - Apr 2023

Bibliographical note

Funding Information:
The authors gratefully acknowledge the experimental support of V Zenin. N A M is a VILLUM Investigator supported by VILLUM FONDEN (Grant No. 16498). S M acknowledges funding from the Marie Skłodowska-Curie Action (Grant Agreement No. 101032967). C W acknowledges funding from a MULTIPLY fellowship under the Marie Skłodowska-Curie COFUND Action (Grant Agreement No. 713694). The Center for Nanostructured Graphene (CNG) is sponsored by the Danish National Research Foundation (Project No. DNRF103). The Center for Polariton-driven Light–Matter Interactions (POLIMA) is sponsored by the Danish National Research Foundation (Project No. DNRF165).

Publisher Copyright:
© 2023 The Author(s). Published by IOP Publishing Ltd.

Keywords

Cathodoluminescence
Electron-beam excitation
Hexagonal boron nitride
Photon superbunching
Transition metal dichalcogenide monolayer
van der Waals heterostructures

Access to Document

10.1088/2053-1583/acbf66

FulltextFinal published version, 1.13 MB

OpenUrl availability

Check availability in DTU Findit

Cite this

@article{83c28e67e0bf4019aba06b3992b4a161,

title = "Photon superbunching in cathodoluminescence of excitons in WS2 monolayer",

abstract = "Cathodoluminescence spectroscopy in conjunction with second-order auto-correlation measurements of g 2 ( τ ) allows to extensively study the synchronization of photon emitters in low-dimensional structures. Co-existing excitons in two-dimensional transition metal dichalcogenide monolayers provide a great source of identical photon emitters which can be simultaneously excited by an electron. Here, we demonstrate large photon bunching with g 2 ( 0 ) up to 156 ± 16 of a tungsten disulfide monolayer (WS2), exhibiting a strong dependence on the electron-beam current. To further improve the excitation synchronization and the electron-emitter interaction, we show exemplary that the careful selection of a simple and compact geometry{\textemdash}a thin, monocrystalline gold nanodisk{\textemdash}can be used to realize a record-high bunching g 2 ( 0 ) of up to 2152 ± 236 . This approach to control the electron excitation of excitons in a WS2 monolayer allows for the synchronization of photon emitters in an ensemble, which is important to further advance light information and computing technologies.",

keywords = "Cathodoluminescence, Electron-beam excitation, Hexagonal boron nitride, Photon superbunching, Transition metal dichalcogenide monolayer, van der Waals heterostructures",

author = "Saskia Fiedler and Sergii Morozov and Leonid Iliushyn and Sergejs Boroviks and Martin Thomaschewski and Jianfang Wang and Booth, \{Timothy J.\} and Nicolas Stenger and Christian Wolff and Mortensen, \{N. Asger\}",

note = "Funding Information: The authors gratefully acknowledge the experimental support of V Zenin. N A M is a VILLUM Investigator supported by VILLUM FONDEN (Grant No. 16498). S M acknowledges funding from the Marie Sk{\l}odowska-Curie Action (Grant Agreement No. 101032967). C W acknowledges funding from a MULTIPLY fellowship under the Marie Sk{\l}odowska-Curie COFUND Action (Grant Agreement No. 713694). The Center for Nanostructured Graphene (CNG) is sponsored by the Danish National Research Foundation (Project No. DNRF103). The Center for Polariton-driven Light{\textendash}Matter Interactions (POLIMA) is sponsored by the Danish National Research Foundation (Project No. DNRF165). Publisher Copyright: {\textcopyright} 2023 The Author(s). Published by IOP Publishing Ltd.",

year = "2023",

month = apr,

doi = "10.1088/2053-1583/acbf66",

language = "English",

volume = "10",

journal = "2D materials",

issn = "2053-1583",

publisher = "IOP Publishing",

number = "2",

}

TY - JOUR

T1 - Photon superbunching in cathodoluminescence of excitons in WS2 monolayer

AU - Fiedler, Saskia

AU - Morozov, Sergii

AU - Iliushyn, Leonid

AU - Boroviks, Sergejs

AU - Thomaschewski, Martin

AU - Wang, Jianfang

AU - Booth, Timothy J.

AU - Stenger, Nicolas

AU - Wolff, Christian

AU - Mortensen, N. Asger

N1 - Funding Information: The authors gratefully acknowledge the experimental support of V Zenin. N A M is a VILLUM Investigator supported by VILLUM FONDEN (Grant No. 16498). S M acknowledges funding from the Marie Skłodowska-Curie Action (Grant Agreement No. 101032967). C W acknowledges funding from a MULTIPLY fellowship under the Marie Skłodowska-Curie COFUND Action (Grant Agreement No. 713694). The Center for Nanostructured Graphene (CNG) is sponsored by the Danish National Research Foundation (Project No. DNRF103). The Center for Polariton-driven Light–Matter Interactions (POLIMA) is sponsored by the Danish National Research Foundation (Project No. DNRF165). Publisher Copyright: © 2023 The Author(s). Published by IOP Publishing Ltd.

PY - 2023/4

Y1 - 2023/4

N2 - Cathodoluminescence spectroscopy in conjunction with second-order auto-correlation measurements of g 2 ( τ ) allows to extensively study the synchronization of photon emitters in low-dimensional structures. Co-existing excitons in two-dimensional transition metal dichalcogenide monolayers provide a great source of identical photon emitters which can be simultaneously excited by an electron. Here, we demonstrate large photon bunching with g 2 ( 0 ) up to 156 ± 16 of a tungsten disulfide monolayer (WS2), exhibiting a strong dependence on the electron-beam current. To further improve the excitation synchronization and the electron-emitter interaction, we show exemplary that the careful selection of a simple and compact geometry—a thin, monocrystalline gold nanodisk—can be used to realize a record-high bunching g 2 ( 0 ) of up to 2152 ± 236 . This approach to control the electron excitation of excitons in a WS2 monolayer allows for the synchronization of photon emitters in an ensemble, which is important to further advance light information and computing technologies.

AB - Cathodoluminescence spectroscopy in conjunction with second-order auto-correlation measurements of g 2 ( τ ) allows to extensively study the synchronization of photon emitters in low-dimensional structures. Co-existing excitons in two-dimensional transition metal dichalcogenide monolayers provide a great source of identical photon emitters which can be simultaneously excited by an electron. Here, we demonstrate large photon bunching with g 2 ( 0 ) up to 156 ± 16 of a tungsten disulfide monolayer (WS2), exhibiting a strong dependence on the electron-beam current. To further improve the excitation synchronization and the electron-emitter interaction, we show exemplary that the careful selection of a simple and compact geometry—a thin, monocrystalline gold nanodisk—can be used to realize a record-high bunching g 2 ( 0 ) of up to 2152 ± 236 . This approach to control the electron excitation of excitons in a WS2 monolayer allows for the synchronization of photon emitters in an ensemble, which is important to further advance light information and computing technologies.

KW - Cathodoluminescence

KW - Electron-beam excitation

KW - Hexagonal boron nitride

KW - Photon superbunching

KW - Transition metal dichalcogenide monolayer

KW - van der Waals heterostructures

U2 - 10.1088/2053-1583/acbf66

DO - 10.1088/2053-1583/acbf66

M3 - Journal article

AN - SCOPUS:85149825646

SN - 2053-1583

VL - 10

JO - 2D materials

JF - 2D materials

IS - 2

M1 - 021002

ER -