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Eutectic liquid alloys for plasmonics: theory and experiment
Martin G Blaber1, Clifford J Engel, S R C Vivekchand
1Department of Chemistry, Northwestern University, Evanston, 60208, USA.
Nano Letters
|September 19, 2012
Summary
Density functional theory molecular dynamics accurately predicts plasmonic properties of liquid metals and alloys. Room-temperature liquid metal alloys offer viable plasmonic applications despite minor performance changes.
Area of Science:
- Computational materials science
- Condensed matter physics
- Plasmonics
Background:
- Liquid metals and their alloys are promising for plasmonic applications.
- Predicting the optical properties of liquid systems from first principles is challenging.
Purpose of the Study:
- To develop and validate a first-principles method for calculating plasmonic properties of liquid metals and alloys.
- To investigate the plasmonic performance of the indium-gallium (In-Ga) alloy system.
Main Methods:
- Density functional theory molecular dynamics (DFT-MD) simulations.
- Calculation of optical constants and plasmonic properties.
- Comparison of simulated results with experimental measurements.
Main Results:
- Exceptional agreement between simulated and measured optical constants for liquid gallium (Ga) and In-Ga eutectic alloy.
- Plasmonic performance of In-Ga alloys decreases with increasing indium concentration.
- The room-temperature liquid nature of the eutectic alloy offers practical advantages.
Conclusions:
- DFT-MD is a reliable predictive tool for the optical properties of liquid metal plasmonics.
- The In-Ga eutectic alloy presents a promising room-temperature plasmonic liquid.
- This method enables the exploration of novel liquid metal systems for plasmonic devices.
