Eutectic Liquid Alloys for Plasmonics: Theory and Experiment

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• 作者：Martin G. Blaber ; Clifford J. Engel ; S. R. C. Vivekchand ; Steven M. Lubin ; Teri W. Odom ; G. C. Schatz
• 刊名：Nano Letters
• 出版年：2012
• 出版时间：October 10, 2012
• 年：2012
• 卷：12
• 期：10
• 页码：5275-5280
• 全文大小：412K
• 年卷期：v.12,no.10(October 10, 2012)
• ISSN：1530-6992

文摘

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鈥揋a eutectic alloy (T_m = 289 K). We then use this method to analyze the plasmonic properties of various alloy concentrations in the In鈥揋a system. The plasmonic performance of the In鈥揋a 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.

Keywords:

g/action/doSearch?action=search&searchText=Surface+plasmon+polaritons&qsSearchArea=searchText">Surface plasmon polaritons; g/action/doSearch?action=search&searchText=liquid+metals&qsSearchArea=searchText">liquid metals; g/action/doSearch?action=search&searchText=gratings&qsSearchArea=searchText">gratings; g/action/doSearch?action=search&searchText=density+functional+theory&qsSearchArea=searchText">density functional theory; g/action/doSearch?action=search&searchText=molecular+dynamics&qsSearchArea=searchText">molecular dynamics; g/action/doSearch?action=search&searchText=simulated+optical+properties&qsSearchArea=searchText">simulated optical properties