Exciton Emission Enhancement in Two-Dimensional Monolayer Tungsten Disulfide on a Silicon Substrate via a Fabry-Pérot Microcavity

Xiaotian Bao; Jianwei Shi; Xu Han; Keming Wu; Xin Zeng; Yuexing Xia; Jinghan Zhao; Zhiyong Zhang; Wenna Du; Shuai Yue; Xianxin Wu; Bo Wu; Yuan Huang; Wenkai Zhang; Xinfeng Liu

doi:10.1021/acs.nanolett.4c05219

Exciton Emission Enhancement in Two-Dimensional Monolayer Tungsten Disulfide on a Silicon Substrate via a Fabry-Pérot Microcavity

Xiaotian Bao, Jianwei Shi, Xu Han, Keming Wu, Xin Zeng, Yuexing Xia, Jinghan Zhao, Zhiyong Zhang, Wenna Du, Shuai Yue, Xianxin Wu, Bo Wu, Yuan Huang^*, Wenkai Zhang^*, Xinfeng Liu^*

^*Corresponding author for this work

Advanced Research Institute of Multidisciplinary Science

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

Exciton emitters in two-dimensional monolayer transition-metal dichalcogenides (TMDs) provide a boulevard for the emerging optoelectronic field, ranging from miniaturized light-emitting diodes to quantum emitters and optical communications. However, the low quantum efficiency from limited light-matter interactions and harmful substrate effects seriously hinders their applications. In this work, we achieve a ∼438-fold exciton photoluminescence enhancement by constructing a Fabry-Pérot cavity consisting of monolayer WS₂ and a micron-scale hole on the SiO₂/Si substrate. The overall enhancement results from the increased exciton-photon interaction due to the effective exciton-cavity mode coupling and decreased trion formation from the weakened substrate effect confirmed by transient spectroscopy. Moreover, the effective coupling improves the directivity of excitons’ spontaneous radiation (fwhm ∼ 5°). This research reveals a practical platform for simultaneously enhancing exciton emission and attenuating the substrate effect, and it provides a blueprint for the development of two-dimensional monolayer TMDs-based emitters in integrated optoelectronic devices.

Original language	English
Pages (from-to)	2639-2646
Number of pages	8
Journal	Nano Letters
Volume	25
Issue number	7
DOIs	https://doi.org/10.1021/acs.nanolett.4c05219
Publication status	Published - 19 Feb 2025

Keywords

Fabry−Pérot cavity
monolayer WS
PL enhancement
substrate effect
two-dimensional transition-metal dichalcogenides

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10.1021/acs.nanolett.4c05219

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@article{10c19d5481064cd0a261b84cf3a029ff,

title = "Exciton Emission Enhancement in Two-Dimensional Monolayer Tungsten Disulfide on a Silicon Substrate via a Fabry-P{\'e}rot Microcavity",

abstract = "Exciton emitters in two-dimensional monolayer transition-metal dichalcogenides (TMDs) provide a boulevard for the emerging optoelectronic field, ranging from miniaturized light-emitting diodes to quantum emitters and optical communications. However, the low quantum efficiency from limited light-matter interactions and harmful substrate effects seriously hinders their applications. In this work, we achieve a ∼438-fold exciton photoluminescence enhancement by constructing a Fabry-P{\'e}rot cavity consisting of monolayer WS2 and a micron-scale hole on the SiO2/Si substrate. The overall enhancement results from the increased exciton-photon interaction due to the effective exciton-cavity mode coupling and decreased trion formation from the weakened substrate effect confirmed by transient spectroscopy. Moreover, the effective coupling improves the directivity of excitons{\textquoteright} spontaneous radiation (fwhm ∼ 5°). This research reveals a practical platform for simultaneously enhancing exciton emission and attenuating the substrate effect, and it provides a blueprint for the development of two-dimensional monolayer TMDs-based emitters in integrated optoelectronic devices.",

keywords = "Fabry−P{\'e}rot cavity, monolayer WS, PL enhancement, substrate effect, two-dimensional transition-metal dichalcogenides",

author = "Xiaotian Bao and Jianwei Shi and Xu Han and Keming Wu and Xin Zeng and Yuexing Xia and Jinghan Zhao and Zhiyong Zhang and Wenna Du and Shuai Yue and Xianxin Wu and Bo Wu and Yuan Huang and Wenkai Zhang and Xinfeng Liu",

note = "Publisher Copyright: {\textcopyright} 2025 American Chemical Society.",

year = "2025",

month = feb,

day = "19",

doi = "10.1021/acs.nanolett.4c05219",

language = "English",

volume = "25",

pages = "2639--2646",

journal = "Nano Letters",

issn = "1530-6984",

publisher = "American Chemical Society",

number = "7",

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TY - JOUR

T1 - Exciton Emission Enhancement in Two-Dimensional Monolayer Tungsten Disulfide on a Silicon Substrate via a Fabry-Pérot Microcavity

AU - Bao, Xiaotian

AU - Shi, Jianwei

AU - Han, Xu

AU - Wu, Keming

AU - Zeng, Xin

AU - Xia, Yuexing

AU - Zhao, Jinghan

AU - Zhang, Zhiyong

AU - Du, Wenna

AU - Yue, Shuai

AU - Wu, Xianxin

AU - Wu, Bo

AU - Huang, Yuan

AU - Zhang, Wenkai

AU - Liu, Xinfeng

PY - 2025/2/19

Y1 - 2025/2/19

N2 - Exciton emitters in two-dimensional monolayer transition-metal dichalcogenides (TMDs) provide a boulevard for the emerging optoelectronic field, ranging from miniaturized light-emitting diodes to quantum emitters and optical communications. However, the low quantum efficiency from limited light-matter interactions and harmful substrate effects seriously hinders their applications. In this work, we achieve a ∼438-fold exciton photoluminescence enhancement by constructing a Fabry-Pérot cavity consisting of monolayer WS2 and a micron-scale hole on the SiO2/Si substrate. The overall enhancement results from the increased exciton-photon interaction due to the effective exciton-cavity mode coupling and decreased trion formation from the weakened substrate effect confirmed by transient spectroscopy. Moreover, the effective coupling improves the directivity of excitons’ spontaneous radiation (fwhm ∼ 5°). This research reveals a practical platform for simultaneously enhancing exciton emission and attenuating the substrate effect, and it provides a blueprint for the development of two-dimensional monolayer TMDs-based emitters in integrated optoelectronic devices.

AB - Exciton emitters in two-dimensional monolayer transition-metal dichalcogenides (TMDs) provide a boulevard for the emerging optoelectronic field, ranging from miniaturized light-emitting diodes to quantum emitters and optical communications. However, the low quantum efficiency from limited light-matter interactions and harmful substrate effects seriously hinders their applications. In this work, we achieve a ∼438-fold exciton photoluminescence enhancement by constructing a Fabry-Pérot cavity consisting of monolayer WS2 and a micron-scale hole on the SiO2/Si substrate. The overall enhancement results from the increased exciton-photon interaction due to the effective exciton-cavity mode coupling and decreased trion formation from the weakened substrate effect confirmed by transient spectroscopy. Moreover, the effective coupling improves the directivity of excitons’ spontaneous radiation (fwhm ∼ 5°). This research reveals a practical platform for simultaneously enhancing exciton emission and attenuating the substrate effect, and it provides a blueprint for the development of two-dimensional monolayer TMDs-based emitters in integrated optoelectronic devices.

KW - Fabry−Pérot cavity

KW - monolayer WS

KW - PL enhancement

KW - substrate effect

KW - two-dimensional transition-metal dichalcogenides

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DO - 10.1021/acs.nanolett.4c05219

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JF - Nano Letters

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ER -

Exciton Emission Enhancement in Two-Dimensional Monolayer Tungsten Disulfide on a Silicon Substrate via a Fabry-Pérot Microcavity

Abstract

Keywords

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