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Synthesis of Near-Infrared Emitting Gold Nanoclusters for Biological Applications
Published on: March 22, 2020
Gold nanoring trimers: a versatile structure for infrared sensing
Siew Lang Teo1, Vivian Kaixin Lin, Renaud Marty
1Institute of Materials Research and Engineering, Agency for Science, Technology, and Research, 3 Research Link, 117602 Singapore.
Optics Express
|October 14, 2010
Summary
Gold nanoring trimers exhibit infrared surface plasmon resonances influenced by geometry. This configuration creates localized electromagnetic energy, ideal for sensing and surface-enhanced spectroscopy applications.
Area of Science:
- Plasmonics and Nanophotonics
- Materials Science
Background:
- Localized surface plasmon resonances (LSPRs) are crucial for nanoscale optical phenomena.
- Tailoring plasmonic properties requires precise control over nanostructure geometry and arrangement.
Purpose of the Study:
- To investigate the surface plasmon properties of periodic arrays of gold nanoring trimers.
- To understand the influence of nanoring geometry and relative positions on LSPRs.
- To explore the potential of these nanostructures as plasmonic nanoresonators.
Main Methods:
- Fabrication of gold nanoring trimers using electron beam lithography.
- Optical characterization of localized surface plasmon resonances in the infrared spectral region.
- Numerical simulations of optical extinction spectra and electric near-field intensity maps.
Main Results:
- Observed LSPRs in the infrared spectral region for gold nanoring trimers.
- Demonstrated strong influence of nanoring geometry and inter-nanoring distances on resonance frequencies.
- Identified resonances arising from strong intra-trimer electromagnetic interactions.
Conclusions:
- Gold nanoring trimers exhibit tunable infrared LSPRs.
- The nanoring trimer configuration enables strong electromagnetic energy localization.
- These plasmonic nanoresonators are suitable for infrared sensing and surface-enhanced Raman spectroscopy.
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