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Updated: Feb 15, 2026
07:39
Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
Published on: July 21, 2018
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Coupling of Elementary Electronic Excitations: Drawing Parallels Between Excitons and Plasmons
Reshmi Thomas1, Jatish Kumar1, Jino George1
1School of Chemistry, Indian Institute of Science Education and Research Thiruvananthapuram (IISER-TVM) , Vithura, Thiruvananthapuram 695551, India.
The Journal of Physical Chemistry Letters
|February 3, 2018
Summary
Excitons and plasmons exhibit similar behaviors in assemblies, with plasmonic systems showing stronger interactions. This leads to enhanced optical properties and applications like analyte detection using capillary platforms.
Area of Science:
- Optics and Photonics
- Materials Science
- Nanotechnology
Background:
- Excitons in chromophores and plasmons in noble metal nanostructures are key quantum phenomena.
- Understanding their isolated and assembled properties reveals interesting parallels.
- Dipolar coupling model provides a framework to study these interactions.
Purpose of the Study:
- To discuss the parallels between excitons and plasmons.
- To explore novel optical properties in assemblies of chromophores and nanostructures.
- To highlight applications in analyte detection.
Main Methods:
- Utilizing the dipolar coupling model.
- Analyzing excitonic transitions in chromophores.
- Investigating plasmonic resonances in noble metal nanostructures.
- Studying linear, parallel, and helical assemblies with varying parameters.
Main Results:
- Identified novel optical properties in assembled chromophores and nanostructures.
- Demonstrated significantly higher dipolar strengths in plasmonic transitions compared to excitonic ones.
- Observed the emergence of 'hot spots' in plasmonically coupled assemblies.
- Correlated electric field distance dependence with Raman signal enhancements.
Conclusions:
- The collective electronic excitations in nanostructures lead to strong plasmonic interactions and hot spots.
- These findings enable the development of sensitive analytical platforms.
- Capillary tube-based plasmonic platforms show promise for analyte detection.
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