Single-Crystalline Gold Nanodisks on WS 2 Mono- and Multilayers for Strong Coupling at Room Temperature

Mathias Geisler, Ximin Cui, Jianfang Wang, Tomas Rindzevicius, Lene Gammelgaard, Bjarke S. Jessen, P. A.D. Gonçalves, Francesco Todisco, Peter Bøggild, Anja Boisen, Martijn Wubs, N. Asger Mortensen, Sanshui Xiao, Nicolas Stenger*

*Kontaktforfatter for dette arbejde

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Resumé

Engineering light-matter interactions up to the strong-coupling regime at room temperature is one of the cornerstones of modern nanophotonics. Achieving this goal could enable new platforms for potential applications such as quantum information processing, quantum light sources, and even quantum metrology. Layered materials like transition metal dichalcogenides (TMDCs) and, in particular, tungsten disulfide (WS 2 ), possess strong dipole moments which are comparable to semiconductor-based quantum dots, but the former also exhibit large exciton binding energies, thereby making TMDCs suitable candidates for exploring light-matter interactions at ambient conditions. Furthermore, the combination of TMDCs with plasmonic nanocavities, which tightly confine light down to nanometer scale, has recently emerged as a suitable platform for achieving strong coupling between plasmons and excitons at room temperature. Here, we use ultrathin single-crystalline gold nanodisks featuring large in-plane electric dipole moments aligned with the exciton's dipole moments in monolayer WS 2 . By performing both scattering and reflection spectroscopy, we demonstrate strong coupling at room temperature with a Rabi splitting of ∼108 meV. In addition, when the plasmonic resonance of these nanodisks is coupled with few-layer WS 2 , a Rabi splitting of ∼175 meV is observed, with a major increase of 62% relative to the monolayer configuration. Our results therefore suggest that ultrathin single-crystalline gold nanodisks coupled to WS 2 constitute an attractive platform to explore light-matter interactions in the strong-coupling regime.

OriginalsprogEngelsk
TidsskriftACS Photonics
Vol/bind6
Udgave nummer4
Sider (fra-til)994-1001
Antal sider8
ISSN2330-4022
DOI
StatusUdgivet - 17. apr. 2019

Fingeraftryk

Gold
Monolayers
Multilayers
Excitons
gold
Crystalline materials
Transition metals
dipole moments
platforms
transition metals
Dipole moment
excitons
room temperature
Metals
Electric dipole moments
Nanophotonics
Temperature
Tungsten
Plasmons
interactions

Citer dette

Geisler, M., Cui, X., Wang, J., Rindzevicius, T., Gammelgaard, L., Jessen, B. S., ... Stenger, N. (2019). Single-Crystalline Gold Nanodisks on WS 2 Mono- and Multilayers for Strong Coupling at Room Temperature. ACS Photonics, 6(4), 994-1001. https://doi.org/10.1021/acsphotonics.8b01766
Geisler, Mathias ; Cui, Ximin ; Wang, Jianfang ; Rindzevicius, Tomas ; Gammelgaard, Lene ; Jessen, Bjarke S. ; Gonçalves, P. A.D. ; Todisco, Francesco ; Bøggild, Peter ; Boisen, Anja ; Wubs, Martijn ; Mortensen, N. Asger ; Xiao, Sanshui ; Stenger, Nicolas. / Single-Crystalline Gold Nanodisks on WS 2 Mono- and Multilayers for Strong Coupling at Room Temperature. I: ACS Photonics. 2019 ; Bind 6, Nr. 4. s. 994-1001.
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title = "Single-Crystalline Gold Nanodisks on WS 2 Mono- and Multilayers for Strong Coupling at Room Temperature",
abstract = "Engineering light-matter interactions up to the strong-coupling regime at room temperature is one of the cornerstones of modern nanophotonics. Achieving this goal could enable new platforms for potential applications such as quantum information processing, quantum light sources, and even quantum metrology. Layered materials like transition metal dichalcogenides (TMDCs) and, in particular, tungsten disulfide (WS 2 ), possess strong dipole moments which are comparable to semiconductor-based quantum dots, but the former also exhibit large exciton binding energies, thereby making TMDCs suitable candidates for exploring light-matter interactions at ambient conditions. Furthermore, the combination of TMDCs with plasmonic nanocavities, which tightly confine light down to nanometer scale, has recently emerged as a suitable platform for achieving strong coupling between plasmons and excitons at room temperature. Here, we use ultrathin single-crystalline gold nanodisks featuring large in-plane electric dipole moments aligned with the exciton's dipole moments in monolayer WS 2 . By performing both scattering and reflection spectroscopy, we demonstrate strong coupling at room temperature with a Rabi splitting of ∼108 meV. In addition, when the plasmonic resonance of these nanodisks is coupled with few-layer WS 2 , a Rabi splitting of ∼175 meV is observed, with a major increase of 62{\%} relative to the monolayer configuration. Our results therefore suggest that ultrathin single-crystalline gold nanodisks coupled to WS 2 constitute an attractive platform to explore light-matter interactions in the strong-coupling regime.",
keywords = "excitons, gold nanodisks, plasmonics, strong coupling, TMDC, WS",
author = "Mathias Geisler and Ximin Cui and Jianfang Wang and Tomas Rindzevicius and Lene Gammelgaard and Jessen, {Bjarke S.} and Gon{\cc}alves, {P. A.D.} and Francesco Todisco and Peter B{\o}ggild and Anja Boisen and Martijn Wubs and Mortensen, {N. Asger} and Sanshui Xiao and Nicolas Stenger",
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Geisler, M, Cui, X, Wang, J, Rindzevicius, T, Gammelgaard, L, Jessen, BS, Gonçalves, PAD, Todisco, F, Bøggild, P, Boisen, A, Wubs, M, Mortensen, NA, Xiao, S & Stenger, N 2019, 'Single-Crystalline Gold Nanodisks on WS 2 Mono- and Multilayers for Strong Coupling at Room Temperature', ACS Photonics, bind 6, nr. 4, s. 994-1001. https://doi.org/10.1021/acsphotonics.8b01766

Single-Crystalline Gold Nanodisks on WS 2 Mono- and Multilayers for Strong Coupling at Room Temperature. / Geisler, Mathias; Cui, Ximin; Wang, Jianfang; Rindzevicius, Tomas; Gammelgaard, Lene; Jessen, Bjarke S.; Gonçalves, P. A.D.; Todisco, Francesco; Bøggild, Peter; Boisen, Anja; Wubs, Martijn; Mortensen, N. Asger; Xiao, Sanshui; Stenger, Nicolas.

I: ACS Photonics, Bind 6, Nr. 4, 17.04.2019, s. 994-1001.

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

TY - JOUR

T1 - Single-Crystalline Gold Nanodisks on WS 2 Mono- and Multilayers for Strong Coupling at Room Temperature

AU - Geisler, Mathias

AU - Cui, Ximin

AU - Wang, Jianfang

AU - Rindzevicius, Tomas

AU - Gammelgaard, Lene

AU - Jessen, Bjarke S.

AU - Gonçalves, P. A.D.

AU - Todisco, Francesco

AU - Bøggild, Peter

AU - Boisen, Anja

AU - Wubs, Martijn

AU - Mortensen, N. Asger

AU - Xiao, Sanshui

AU - Stenger, Nicolas

PY - 2019/4/17

Y1 - 2019/4/17

N2 - Engineering light-matter interactions up to the strong-coupling regime at room temperature is one of the cornerstones of modern nanophotonics. Achieving this goal could enable new platforms for potential applications such as quantum information processing, quantum light sources, and even quantum metrology. Layered materials like transition metal dichalcogenides (TMDCs) and, in particular, tungsten disulfide (WS 2 ), possess strong dipole moments which are comparable to semiconductor-based quantum dots, but the former also exhibit large exciton binding energies, thereby making TMDCs suitable candidates for exploring light-matter interactions at ambient conditions. Furthermore, the combination of TMDCs with plasmonic nanocavities, which tightly confine light down to nanometer scale, has recently emerged as a suitable platform for achieving strong coupling between plasmons and excitons at room temperature. Here, we use ultrathin single-crystalline gold nanodisks featuring large in-plane electric dipole moments aligned with the exciton's dipole moments in monolayer WS 2 . By performing both scattering and reflection spectroscopy, we demonstrate strong coupling at room temperature with a Rabi splitting of ∼108 meV. In addition, when the plasmonic resonance of these nanodisks is coupled with few-layer WS 2 , a Rabi splitting of ∼175 meV is observed, with a major increase of 62% relative to the monolayer configuration. Our results therefore suggest that ultrathin single-crystalline gold nanodisks coupled to WS 2 constitute an attractive platform to explore light-matter interactions in the strong-coupling regime.

AB - Engineering light-matter interactions up to the strong-coupling regime at room temperature is one of the cornerstones of modern nanophotonics. Achieving this goal could enable new platforms for potential applications such as quantum information processing, quantum light sources, and even quantum metrology. Layered materials like transition metal dichalcogenides (TMDCs) and, in particular, tungsten disulfide (WS 2 ), possess strong dipole moments which are comparable to semiconductor-based quantum dots, but the former also exhibit large exciton binding energies, thereby making TMDCs suitable candidates for exploring light-matter interactions at ambient conditions. Furthermore, the combination of TMDCs with plasmonic nanocavities, which tightly confine light down to nanometer scale, has recently emerged as a suitable platform for achieving strong coupling between plasmons and excitons at room temperature. Here, we use ultrathin single-crystalline gold nanodisks featuring large in-plane electric dipole moments aligned with the exciton's dipole moments in monolayer WS 2 . By performing both scattering and reflection spectroscopy, we demonstrate strong coupling at room temperature with a Rabi splitting of ∼108 meV. In addition, when the plasmonic resonance of these nanodisks is coupled with few-layer WS 2 , a Rabi splitting of ∼175 meV is observed, with a major increase of 62% relative to the monolayer configuration. Our results therefore suggest that ultrathin single-crystalline gold nanodisks coupled to WS 2 constitute an attractive platform to explore light-matter interactions in the strong-coupling regime.

KW - excitons

KW - gold nanodisks

KW - plasmonics

KW - strong coupling

KW - TMDC

KW - WS

U2 - 10.1021/acsphotonics.8b01766

DO - 10.1021/acsphotonics.8b01766

M3 - Journal article

VL - 6

SP - 994

EP - 1001

JO - A C S Photonics

JF - A C S Photonics

SN - 2330-4022

IS - 4

ER -