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Related Experiment Video

Updated: Feb 10, 2026

Author Spotlight: Single-Molecule Surface-Enhanced Raman Scattering Measurements Enabled by Plasmonic DNA Origami Nanoantennas

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Artificial Plasmonic Molecules and Their Interaction with Real Molecules.

Gilad Haran¹, Lev Chuntonov²

¹Chemical and Biological Physics Department , Weizmann Institute of Science , Rehovot 760001 , Israel.

Chemical Reviews

|May 22, 2018

Summary

Plasmonic molecules, assemblies of metal nanoparticles, exhibit unique optical properties due to particle interactions. Their concentrated electromagnetic fields in "hotspots" enable advanced spectroscopies and novel chemical reactions.

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Area of Science:

* Nanophotonics and Plasmonics
* Molecular Spectroscopy
* Materials Science

Background:

* Plasmonic molecules are nanoscale metal particle assemblies with tunable optical properties.
* Particle interactions significantly alter optical characteristics, enabling applications in sensing and spectroscopy.
* These molecules can be fabricated via nanofabrication or self-assembly in solution.

Purpose of the Study:

* To review the fundamental properties of plasmonic molecules, focusing on their optical behavior.
* To elucidate the relationship between molecular structure, light interaction, and resulting excitations.
* To explore the generation and utilization of electromagnetic field enhancements in plasmonic molecules.

Main Methods:

* Discussion of normal mode analysis for plasmonic molecule excitations.
* Examination of particle dimer as the simplest plasmonic molecule and its symmetric dipolar mode.
* Analysis of complex excitations in multi-particle systems.
* Characterization of electromagnetic field confinement in inter-particle gaps ('hotspots').

Main Results:

* Plasmonic molecules exhibit distinct normal mode excitations, with dimers showing a fundamental symmetric dipolar mode.
* Particle gaps concentrate electromagnetic fields, creating 'hotspots' crucial for enhanced spectroscopies.
* Spectroscopic methods can effectively characterize fields around plasmonic molecules.
* Strong fields drive phenomena like plasmon-induced chemical reactions and quantum emitter coupling.

Conclusions:

* Plasmonic molecules offer a versatile platform for manipulating light-matter interactions at the nanoscale.
* The understanding of their basic properties is key to advancing enhanced spectroscopies and driving new quantum phenomena.
* Future research can leverage these properties for novel applications in chemistry and quantum optics.