Tunable Fano Resonance and Plasmon–Exciton Coupling in Single Au Nanotriangles on Monolayer WS2 at Room Temperature

Mingsong Wang, Alex Krasnok, Tianyi Zhang, Leonardo Scarabelli, He Liu, Zilong Wu, Luis M. Liz-Marzán, Mauricio Terrones Maldonado, Andrea Alù, Yuebing Zheng

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

Tunable Fano resonances and plasmon–exciton coupling are demonstrated at room temperature in hybrid systems consisting of single plasmonic nanoparticles deposited on top of the transition metal dichalcogenide monolayers. By using single Au nanotriangles (AuNTs) on monolayer WS2 as model systems, Fano resonances are observed from the interference between a discrete exciton band of monolayer WS2 and a broadband plasmonic mode of single AuNTs. The Fano lineshape depends on the exciton binding energy and the localized surface plasmon resonance strength, which can be tuned by the dielectric constant of surrounding solvents and AuNT size, respectively. Moreover, a transition from weak to strong plasmon–exciton coupling with Rabi splitting energies of 100–340 meV is observed by rationally changing the surrounding solvents. With their tunable plasmon–exciton interactions, the proposed WS2–AuNT hybrids can open new pathways to develop active nanophotonic devices.

Original languageEnglish (US)
Article number1705779
JournalAdvanced Materials
Volume30
Issue number22
DOIs
StatePublished - May 29 2018

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Monolayers
Excitons
Nanophotonics
Surface plasmon resonance
Binding energy
Hybrid systems
Temperature
Transition metals
Permittivity
Nanoparticles
LDS 751

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Wang, Mingsong ; Krasnok, Alex ; Zhang, Tianyi ; Scarabelli, Leonardo ; Liu, He ; Wu, Zilong ; Liz-Marzán, Luis M. ; Terrones Maldonado, Mauricio ; Alù, Andrea ; Zheng, Yuebing. / Tunable Fano Resonance and Plasmon–Exciton Coupling in Single Au Nanotriangles on Monolayer WS2 at Room Temperature. In: Advanced Materials. 2018 ; Vol. 30, No. 22.
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abstract = "Tunable Fano resonances and plasmon–exciton coupling are demonstrated at room temperature in hybrid systems consisting of single plasmonic nanoparticles deposited on top of the transition metal dichalcogenide monolayers. By using single Au nanotriangles (AuNTs) on monolayer WS2 as model systems, Fano resonances are observed from the interference between a discrete exciton band of monolayer WS2 and a broadband plasmonic mode of single AuNTs. The Fano lineshape depends on the exciton binding energy and the localized surface plasmon resonance strength, which can be tuned by the dielectric constant of surrounding solvents and AuNT size, respectively. Moreover, a transition from weak to strong plasmon–exciton coupling with Rabi splitting energies of 100–340 meV is observed by rationally changing the surrounding solvents. With their tunable plasmon–exciton interactions, the proposed WS2–AuNT hybrids can open new pathways to develop active nanophotonic devices.",
author = "Mingsong Wang and Alex Krasnok and Tianyi Zhang and Leonardo Scarabelli and He Liu and Zilong Wu and Liz-Marz{\'a}n, {Luis M.} and {Terrones Maldonado}, Mauricio and Andrea Al{\`u} and Yuebing Zheng",
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Wang, M, Krasnok, A, Zhang, T, Scarabelli, L, Liu, H, Wu, Z, Liz-Marzán, LM, Terrones Maldonado, M, Alù, A & Zheng, Y 2018, 'Tunable Fano Resonance and Plasmon–Exciton Coupling in Single Au Nanotriangles on Monolayer WS2 at Room Temperature', Advanced Materials, vol. 30, no. 22, 1705779. https://doi.org/10.1002/adma.201705779

Tunable Fano Resonance and Plasmon–Exciton Coupling in Single Au Nanotriangles on Monolayer WS2 at Room Temperature. / Wang, Mingsong; Krasnok, Alex; Zhang, Tianyi; Scarabelli, Leonardo; Liu, He; Wu, Zilong; Liz-Marzán, Luis M.; Terrones Maldonado, Mauricio; Alù, Andrea; Zheng, Yuebing.

In: Advanced Materials, Vol. 30, No. 22, 1705779, 29.05.2018.

Research output: Contribution to journalArticle

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AU - Wang, Mingsong

AU - Krasnok, Alex

AU - Zhang, Tianyi

AU - Scarabelli, Leonardo

AU - Liu, He

AU - Wu, Zilong

AU - Liz-Marzán, Luis M.

AU - Terrones Maldonado, Mauricio

AU - Alù, Andrea

AU - Zheng, Yuebing

PY - 2018/5/29

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N2 - Tunable Fano resonances and plasmon–exciton coupling are demonstrated at room temperature in hybrid systems consisting of single plasmonic nanoparticles deposited on top of the transition metal dichalcogenide monolayers. By using single Au nanotriangles (AuNTs) on monolayer WS2 as model systems, Fano resonances are observed from the interference between a discrete exciton band of monolayer WS2 and a broadband plasmonic mode of single AuNTs. The Fano lineshape depends on the exciton binding energy and the localized surface plasmon resonance strength, which can be tuned by the dielectric constant of surrounding solvents and AuNT size, respectively. Moreover, a transition from weak to strong plasmon–exciton coupling with Rabi splitting energies of 100–340 meV is observed by rationally changing the surrounding solvents. With their tunable plasmon–exciton interactions, the proposed WS2–AuNT hybrids can open new pathways to develop active nanophotonic devices.

AB - Tunable Fano resonances and plasmon–exciton coupling are demonstrated at room temperature in hybrid systems consisting of single plasmonic nanoparticles deposited on top of the transition metal dichalcogenide monolayers. By using single Au nanotriangles (AuNTs) on monolayer WS2 as model systems, Fano resonances are observed from the interference between a discrete exciton band of monolayer WS2 and a broadband plasmonic mode of single AuNTs. The Fano lineshape depends on the exciton binding energy and the localized surface plasmon resonance strength, which can be tuned by the dielectric constant of surrounding solvents and AuNT size, respectively. Moreover, a transition from weak to strong plasmon–exciton coupling with Rabi splitting energies of 100–340 meV is observed by rationally changing the surrounding solvents. With their tunable plasmon–exciton interactions, the proposed WS2–AuNT hybrids can open new pathways to develop active nanophotonic devices.

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