ACS_Applied Materials & Interfaces
April 15, 2026
Volume 18, Issue 14
Pages 19959-21322
Hybridized Plasmons in Au Nanowire Dimers Enable Polarization-Selective Exciton Modulation and Hot-Electron Injection in MoS2
- Jungyoon Cho
- Mijeong Kim
- Nahyun Kim
- Annas S. Ariffin
- Jiashuo Huo
- Keya Zhou
- Jeongyong Kim
- Dong-Wook Kim
Hybridized plasmon modes in coupled metal nanostructures offer unique opportunities to tailor light-matter interactions and interfacial charge transfer at the nanoscale, surpassing the capabilities of isolated plasmonic elements. In this work, we compare the optical and electrical characteristics of MoS2 monolayers integrated with single Au nanowires (S-NWs) and Au nanowire dimers (D-NWs). While S-NW supports a transverse plasmonic resonance at ∼500 nm, D-NW exhibits an additional hybridized plasmon resonance at ∼650 nm originated from strong near-field coupling. This hybridized mode leads to significantly enhanced polarization-selective photoluminescence in MoS2/D-NW integrated systems, accompanied by pronounced modulation of the exciton-to-trion population ratio. Furthermore, polarization- and wavelength-dependent Kelvin probe force microscopy directly visualizes nanoscale surface potential changes, providing real-space evidence of plasmon-mediated hot-electron injection from D-NW into MoS2 at the contact regions. These results demonstrate that D-NWs enable enhanced and tunable plasmon-exciton-charge interactions, establishing TMD/D-NW architectures as a versatile platform for high-performance optoelectronic devices.
https://pubs.acs.org/doi/10.1021/acsami.6c01108
Image created by minjeong Kim / Nanosphere
ACS_Applied Materials & Interfaces
April 15, 2026
Volume 18, Issue 14
Pages 19959-21322
Hybridized Plasmons in Au Nanowire Dimers Enable Polarization-Selective Exciton Modulation and Hot-Electron Injection in MoS2
Hybridized plasmon modes in coupled metal nanostructures offer unique opportunities to tailor light-matter interactions and interfacial charge transfer at the nanoscale, surpassing the capabilities of isolated plasmonic elements. In this work, we compare the optical and electrical characteristics of MoS2 monolayers integrated with single Au nanowires (S-NWs) and Au nanowire dimers (D-NWs). While S-NW supports a transverse plasmonic resonance at ∼500 nm, D-NW exhibits an additional hybridized plasmon resonance at ∼650 nm originated from strong near-field coupling. This hybridized mode leads to significantly enhanced polarization-selective photoluminescence in MoS2/D-NW integrated systems, accompanied by pronounced modulation of the exciton-to-trion population ratio. Furthermore, polarization- and wavelength-dependent Kelvin probe force microscopy directly visualizes nanoscale surface potential changes, providing real-space evidence of plasmon-mediated hot-electron injection from D-NW into MoS2 at the contact regions. These results demonstrate that D-NWs enable enhanced and tunable plasmon-exciton-charge interactions, establishing TMD/D-NW architectures as a versatile platform for high-performance optoelectronic devices.
https://pubs.acs.org/doi/10.1021/acsami.6c01108
Image created by minjeong Kim / Nanosphere