Abstract
| Original language | English |
|---|---|
| Journal | ACS Photonics |
| Volume | 6 |
| Pages (from-to) | 994-1001 |
| ISSN | 2330-4022 |
| DOIs | |
| Publication status | Published - 2019 |
Keywords
- Plasmonics
- TMDC
- WS2
- Strong coupling
- Excitons
- Gold nanodisks
Cite this
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Single-Crystalline Gold Nanodisks on WS2 Mono- and Multilayers for Strong Coupling at Room Temperature. / Geisler, Mathias; Cui, Ximin; Wang, Jianfang; Rindzevicius, Tomas; Gammelgaard, Lene; Jessen, Bjarke Sørensen; Gonçalves, P. A. D.; Todisco, Francesco; Bøggild, Peter; Boisen, Anja; Wubs, Martijn; Mortensen, N. Asger; Xiao, Sanshui ; Stenger, Nicolas.
In: ACS Photonics, Vol. 6, 2019, p. 994-1001.Research output: Contribution to journal › Journal article › Research › peer-review
TY - JOUR
T1 - Single-Crystalline Gold Nanodisks on WS2 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 Sørensen
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
Y1 - 2019
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 (WS2), 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 WS2. 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 WS2, 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 WS2 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 (WS2), 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 WS2. 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 WS2, 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 WS2 constitute an attractive platform to explore light–matter interactions in the strong-coupling regime.
KW - Plasmonics
KW - TMDC
KW - WS2
KW - Strong coupling
KW - Excitons
KW - Gold nanodisks
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
ER -