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Trapping of Micro Particles in Nanoplasmonic Optical Lattice
Published on: September 5, 2017
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Molecular Plasmonic Cavities
Daniel J Rizzo1, Michael Riehs2, Hang Liu3
1Department of Physics, Columbia University, New York, New York 10027, United States.
Nano Letters
|September 11, 2025
Summary
Researchers created molecular plasmonic cavities using C60 on graphene to control light. This technique allows tailoring surface plasmon polariton (SPP) mode volumes for enhanced light-matter interactions.
Area of Science:
- Materials Science
- Nanotechnology
- Optoelectronics
Background:
- Graphene offers a 2D platform for manipulating surface plasmon polaritons (SPPs) with low losses.
- Nanostructuring graphene can enhance light confinement and light-matter interactions via SPP cavity modes.
Purpose of the Study:
- To engineer nanoscale plasmonic cavities using self-assembled C60 arrays on graphene.
- To investigate the behavior of C60 assemblies as molecular plasmonic cavities.
- To demonstrate a method for tailoring SPP mode volume.
Main Methods:
- Utilized scattering-type scanning near-field optical microscopy (s-SNOM).
- Employed first-principles density functional theory (DFT) calculations.
- Performed finite-element simulations.
- Controlled C60 deposition to tune cavity dimensions.
Main Results:
- C60 assemblies acted as molecular plasmonic cavities on graphene.
- Precisely defined hole-doped regions were created in graphene.
- Lateral dimensions of cavities were tuned to the SPP wavelength.
- SPP cavity modes were verified, showing confined SPP patterns.
Conclusions:
- Molecular self-assembly of C60 provides a straightforward method for engineering plasmonic cavities on graphene.
- This approach enables tailored confinement of SPPs and enhanced light-matter interactions.
- The findings offer a new scheme for controlling SPP mode volume in 2D materials.
