Liquid metal-based plasmonics

Optics Express
Jinqi WangAjay Nahata

Abstract

We demonstrate that liquid metals support surface plasmon-polaritons (SPPs) at terahertz (THz) frequencies, and can thus serve as an attractive material system for a wide variety of plasmonic and metamaterial applications. We use eutectic gallium indium (EGaIn) as the liquid metal injected into a polydimethylsiloxane (PDMS) mold fabricated by soft lithography techniques. Using this approach, we observe enhanced THz transmission through a periodic array of subwavelength apertures. Despite of the fact that the DC conductivity of EGaIn is an order of magnitude smaller than many conventional metals, we clearly observe well-defined transmission resonances. This represents a first step in developing reconfigurable and tunable plasmonic devices that build upon well-developed microfluidic capabilities.

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Citations

Oct 7, 2014·ACS Applied Materials & Interfaces·Michael D Dickey
Dec 30, 2014·ACS Applied Materials & Interfaces·Wei ZhangKourosh Kalantar-Zadeh
Dec 4, 2014·ACS Applied Materials & Interfaces·Mohammad R KhanMichael D Dickey
Feb 23, 2017·Lab on a Chip·Khashayar KhoshmaneshMichael D Dickey
Apr 19, 2017·Advanced Materials·Michael D Dickey
Aug 15, 2017·Lab on a Chip·Yiliang LinMichael D Dickey
Jul 18, 2015·Advanced Materials·Weiming ZhuNikolay Zheludev
Jun 21, 2012·Optics Express·Jinqi WangAjay Nahata
Jan 22, 2013·Advanced Materials·Etienne PalleauMichael D Dickey
Mar 26, 2014·Optics Express·Jinqi WangAjay Nahata
Sep 13, 2019·Optics Express·Lei ChenHao Yang Cui
Jul 4, 2015·Small·Mingsong WangYuebing Zheng

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