Eutectic liquid alloys for plasmonics: Theory and experiment

Martin G. Blaber; Clifford J. Engel; S. R.C. Vivekchand; Steven M. Lubin; Teri W. Odom; G. C. Schatz

doi:10.1021/nl3025104

Eutectic liquid alloys for plasmonics: Theory and experiment

Martin G. Blaber, Clifford J. Engel, S. R.C. Vivekchand, Steven M. Lubin, Teri W. Odom, G. C. Schatz

Northwestern University

Research output: Contribution to journal › Article

27 Citations (Scopus)

Abstract

We report a method based on density functional theory molecular dynamics that allows us to calculate the plasmonic properties of liquid metals and metal alloys from first principles with no a priori knowledge of the system. We show exceptional agreement between the simulated and measured optical constants of liquid Ga and the room temperature liquid In-Ga eutectic alloy (T _m = 289 K). We then use this method to analyze the plasmonic properties of various alloy concentrations in the In-Ga system. The plasmonic performance of the In-Ga system decreases with increasing In concentration. However, the benefits of a room-temperature plasmonic liquid are likely to outweigh the minor reduction in plasmonic performance when moving from pure Ga to the eutectic composition. Our results show that density functional theory molecular dynamics can be used as a predictive tool for studying the optical properties of liquid metal systems amenable to plasmonics.

Original language	English
Pages (from-to)	5275-5280
Number of pages	6
Journal	Nano letters
Volume	12
Issue number	10
DOIs	https://doi.org/10.1021/nl3025104
Publication status	Published - Oct 10 2012

Keywords

Surface plasmon polaritons
density functional theory
gratings
liquid metals
molecular dynamics
simulated optical properties

ASJC Scopus subject areas

Bioengineering
Chemistry(all)
Materials Science(all)
Condensed Matter Physics
Mechanical Engineering

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Blaber, M. G., Engel, C. J., Vivekchand, S. R. C., Lubin, S. M., Odom, T. W., & Schatz, G. C. (2012). Eutectic liquid alloys for plasmonics: Theory and experiment. Nano letters, 12(10), 5275-5280. https://doi.org/10.1021/nl3025104

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abstract = "We report a method based on density functional theory molecular dynamics that allows us to calculate the plasmonic properties of liquid metals and metal alloys from first principles with no a priori knowledge of the system. We show exceptional agreement between the simulated and measured optical constants of liquid Ga and the room temperature liquid In-Ga eutectic alloy (T m = 289 K). We then use this method to analyze the plasmonic properties of various alloy concentrations in the In-Ga system. The plasmonic performance of the In-Ga system decreases with increasing In concentration. However, the benefits of a room-temperature plasmonic liquid are likely to outweigh the minor reduction in plasmonic performance when moving from pure Ga to the eutectic composition. Our results show that density functional theory molecular dynamics can be used as a predictive tool for studying the optical properties of liquid metal systems amenable to plasmonics.",

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AU - Odom, Teri W.

AU - Schatz, G. C.

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