Excitation and emission distinguished photoluminescence enhancement in a plasmon–exciton intermediate coupling system
Source abstract
Abstract
Plasmonic nanocavities with tunable resonances provide a powerful platform to manipulate the light-matter interaction at the nanoscale. Here, we investigate the coupling between monolayer MoS2 and the nanocavity formed by a silver nanowire (NW) and a gold film. The splitting of scattering spectra indicates intermediate coupling between the plasmon mode and two exciton states. The coupled system shows a photoluminescence (PL) intensity enhancement of 86-fold for the nanocavity with an appropriate NW diameter. In particular, the excitation and emission enhancement factors are experimentally distinguished, and the simulation results confirm the plasmon resonance dependent excitation and emission enhancements. Moreover, it is shown that the PL emission from the hybrid system becomes strongly polarized, and the degree of linear polarization larger than 0.9 is obtained. These results demonstrate the tunable coupling between plasmon mode and exciton states and help in deepening the understanding of the PL enhancement mechanisms.
Source: europepmc · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Plasmonic and Surface Plasmon Research · Gold and Silver Nanoparticles Synthesis and Applications · Nanowire Synthesis and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Physics and Technology, Center for Nanoscience and Nanotechnology, and Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, Wuhan University, Wuhan 430072, China
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
Institute of Microscale Optoelectronics, Shenzhen University, Shenzhen 518060, China
School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
School of Microelectronics, Wuhan University, Wuhan 430072, China
Songshan Lake Materials Laboratory, Dongguan 523808, China
Funding
National Key Research and Development Program of China · Chinese Academy of Sciences · National Natural Science Foundation of China
References (44)
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