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Published on: December 11, 2013
Plasmon resonance tuning in metallic nanocavities
A Polyakov1, K F Thompson, S D Dhuey
1Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, CA, USA. apolyakov@lbl.gov
Scientific Reports
|December 11, 2012
Summary
Researchers precisely control light absorption and field enhancement in metallic nanocavities. A thin alumina coating allows reversible tuning of the resonance wavelength for optimal performance.
Area of Science:
- Plasmonics and Nanophotonics
- Materials Science and Engineering
Background:
- Metallic nanocavities exhibit complete light absorption and strong field enhancement.
- These properties are technologically valuable for various applications.
Purpose of the Study:
- To demonstrate exquisite control over the resonance wavelength of metallic nanocavities.
- To achieve precise control over the spectral response of these structures.
Main Methods:
- Fabrication of nanocavities in a metallic surface.
- Deposition of a nanometer-thick alumina layer inside the nanocavities.
Main Results:
- The alumina deposition enables precise control over the resonance wavelength.
- The spectral response of the nanocavities can be finely tuned.
Conclusions:
- Alumina deposition offers a reversible method for optimizing nanocavity performance.
- This technique allows for multiple tuning attempts on a single structure.
