Photon superbunching in cathodoluminescence of excitons in WS2 monolayer

Saskia Fiedler; Sergii Morozov; Leonid Iliushyn; Sergejs Boroviks; Martin Thomaschewski; Jianfang Wang; Tim Booth; 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, Tim Booth, Christian Wolff, N. Asger Mortensen

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

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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

Keywords

cathodoluminescence
electron-beam excitation
hexagonal boron nitride
photon superbunching
transition metal dichalcogenide monolayer
van der Waals heterostructures

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10.1088/2053-1583/acbf66Licence: CC BY

Open Access VersionFinal published version, 1.13 MBLicence: CC BY

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2 Poster

Photon superbunching in cathodoluminescence of WS2 monolayer
Morozov, S., Fiedler, S., Iliushyn, L., Boroviks, S., Thomaschewski, M., Wang, J., Booth, T. J., Stenger, N., Wolff, C. & Mortensen, N. A., 7. Jun 2024.
Research output: Contribution to conference without publisher/journal › Poster › Research

Open Access
2DCHEX: Antenna for enhanced electron-matter interactions
Morozov, S., Jun 2023. 1 p.
Research output: Contribution to conference without publisher/journal › Poster › Communication

Open Access

1 Finished

2DCHEX: Tuning emission of charged excitons in two-dimensional transition metal dichalcogenide monolayers
Morozov, S. (Project participant) & Mortensen, N. A. (Project participant)
01/07/2021 → 30/06/2023
Project: EU

Cite this

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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 - 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.",

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 Tim Booth and Christian Wolff and Mortensen, {N. Asger}",

year = "2023",

month = apr,

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

language = "English",

volume = "10",

journal = "2D Materials",

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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, Tim

AU - Wolff, Christian

AU - Mortensen, N. Asger

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

SN - 2053-1583

VL - 10

JO - 2D Materials

JF - 2D Materials

IS - 2

M1 - 021002

ER -

Photon superbunching in cathodoluminescence of excitons in WS2 monolayer

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Photon superbunching in cathodoluminescence of WS2 monolayer

2DCHEX: Antenna for enhanced electron-matter interactions

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2DCHEX: Tuning emission of charged excitons in two-dimensional transition metal dichalcogenide monolayers

Cite this