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Related Experiment Video

Updated: Jul 2, 2026

Synthesis, Characterization, and Functionalization of Hybrid Au/CdS and Au/ZnS Core/Shell Nanoparticles

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Published on: March 2, 2016

Plexcitonic nanoparticles: plasmon-exciton coupling in nanoshell-J-aggregate complexes.

Nche T Fofang¹, Tae-Ho Park, Oara Neumann

¹Department of Electrical and Computer Engineering, Laboratory for Nanophotonics, Rice University, 6100 Main Street, Houston, Texas 77005, USA.

|August 30, 2008

Summary

Stable gold nanoshell-J-aggregate complexes show coherent coupling between plasmons and excitons. This interaction strength depends on the coupled plasmon mode, revealing insights into hybridized states.

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Area of Science:

Plasmonics and Nanophotonics
Molecular Exciton Physics
Hybrid Nanomaterials

Background:

Localized surface plasmons in gold nanoshells offer tunable optical properties.
Molecular J-aggregates exhibit strong excitonic absorption and emission.
Interactions between plasmonic nanoparticles and molecular aggregates are crucial for advanced optical applications.

Purpose of the Study:

To form stable complexes of gold nanoshells and molecular J-aggregates.
To investigate the coherent coupling between nanoshell plasmons and J-aggregate excitons.
To determine the dependence of plasmon-exciton coupling strength on specific plasmon modes.

Main Methods:

Formation of stable gold nanoshell-J-aggregate complexes.
Tuning nanoshell plasmon energies relative to J-aggregate exciton lines.
Characterization of plasmon-exciton coupling energies.
Modeling the hybridized states using Gans theory.

Main Results:

Achieved stable Au nanoshell-J-aggregate complexes exhibiting coherent coupling.
Demonstrated tunable plasmon-exciton coupling energies by adjusting nanoshell plasmon frequencies.
Identified that coupling strength varies with the specific plasmon mode involved.
Derived an expression for plasmon-exciton hybridized states.

Conclusions:

Coherent coupling between nanoshell plasmons and J-aggregate excitons is achievable in stable complexes.
The strength of plasmon-exciton interaction is mode-dependent.
The developed model provides a framework for understanding hybridized states in such systems.
These findings are significant for designing novel hybrid nanomaterials for optical applications.