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Single-Step Plasmonic Dimer Printing by Gold Nanorod Splitting with Light
Francis Schuknecht1, Christoph M Maier1, Paul Vosshage1
1Chair for Photonics and Optoelectronics, Nano-Institute Munich, Department of Physics, Ludwig-Maximilians-Universität (LMU), Königinstraße 10, 80539 Munich, Germany.
Nano Letters
|May 22, 2023
Summary
Researchers developed a single-step method using laser light to split individual gold nanorods into precisely patterned dimer nanoantennas. This technique enables sub-nanometer separations for advanced nanophotonic devices.
Area of Science:
- Nanophotonics
- Plasmonics
- Optical Engineering
Background:
- Optical printing offers precise patterning of plasmonic nanoparticles for nanophotonic devices.
- Generating strongly coupled plasmonic dimers via sequential printing is challenging.
Purpose of the Study:
- To develop a single-step method for generating and patterning dimer nanoantennas.
- To achieve precise control over nanoparticle spacing for enhanced plasmonic coupling.
Main Methods:
- Utilizing laser light to optically split individual gold nanorods in a single step.
- Investigating the physical mechanisms including plasmonic heating, surface tension, optical forces, and hydrodynamic pressure.
Main Results:
- Successfully generated and patterned dimer nanoantennas from single gold nanorods.
- Achieved sub-nanometer separation distances between the two constituent nanoparticles of the dimer.
- Elucidated the combined physical forces responsible for the nanorod splitting process.
Conclusions:
- This single-step optical splitting method provides a highly accurate approach for dimer patterning.
- The technique is suitable for fabricating dimer nanoantennas for various nanophotonic applications.
- Offers a new pathway for precise control over plasmonic coupling in nanostructures.
