Open AccessFlexible liquid metal-filled metamaterial absorber on polydimethylsiloxane (PDMS)
Author(s) -
K.S. Ling,
Kyeoungseob Kim,
Sungjoon Lim
Publication year - 2015
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.021375
Subject(s) - polydimethylsiloxane , materials science , liquid metal , substrate (aquarium) , metamaterial , microfluidics , optics , gallium , elastomer , optoelectronics , indium , eutectic system , electrical conductor , composite material , alloy , nanotechnology , oceanography , physics , metallurgy , geology
In this paper, we propose a novel flexible metamaterial (MM) absorber. The conductive pattern consists of liquid metal eutectic gallium indium alloy (EGaIn) enclosed in elastomeric microfluidic channels. Polydimethylsiloxane (PDMS) material is used as a supporting substrate. The proposed MM absorber is flexible because of its liquid metal and PDMS substrate. Numerical simulations and experimental results are presented when the microfluidic channels are filled with liquid metal. In order to evaluate the proposed MM absorber's performance, the fabricated absorber prototype is tested with rectangular waveguides. Almost perfect absorptivity is achieved at a resonant frequency of 8.22 GHz.