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1. Frequency-Switchable Metamaterial Absorber Injecting Eutectic Gallium-Indium (EGaIn) Liquid Metal Alloy

Author

Kenyu Ling, Hyung Ki Kim, Minyeong Yoo, and Sungjoon Lim

Subjects
metamaterial, resonance, microfluidics, Chemical technology, TP1-1185
Abstract

In this study, we demonstrated a new class of frequency-switchable metamaterial absorber in the X-band. Eutectic gallium-indium (EGaIn), a liquid metal alloy, was injected in a microfluidic channel engraved on polymethyl methacrylate (PMMA) to achieve frequency switching. Numerical simulation and experimental results are presented for two cases: when the microfluidic channels are empty, and when they are filled with liquid metal. To evaluate the performance of the fabricated absorber prototype, it is tested with a rectangular waveguide. The resonant frequency was successfully switched from 10.96 GHz to 10.61 GHz after injecting liquid metal while maintaining absorptivity higher than 98%.

Published
2015
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2. Frequency-Switchable Metamaterial Absorber Injecting Eutectic Gallium-Indium (EGaIn) Liquid Metal Alloy

Author

Minyeong Yoo, Hyung Ki Kim, Kenyu Ling, and Sungjoon Lim

Subjects
Liquid metal, Materials science, Alloy, microfluidics, chemistry.chemical_element, engineering.material, Engraving, metamaterial, lcsh:Chemical technology, Biochemistry, Article, Analytical Chemistry, Electronic engineering, lcsh:TP1-1185, Electrical and Electronic Engineering, Gallium, Instrumentation, Eutectic system, business.industry, Metamaterial, Atomic and Molecular Physics, and Optics, chemistry, resonance, visual_art, Metamaterial absorber, visual_art.visual_art_medium, engineering, Optoelectronics, business, Indium
Abstract

In this study, we demonstrated a new class of frequency-switchable metamaterial absorber in the X-band. Eutectic gallium-indium (EGaIn), a liquid metal alloy, was injected in a microfluidic channel engraved on polymethyl methacrylate (PMMA) to achieve frequency switching. Numerical simulation and experimental results are presented for two cases: when the microfluidic channels are empty, and when they are filled with liquid metal. To evaluate the performance of the fabricated absorber prototype, it is tested with a rectangular waveguide. The resonant frequency was successfully switched from 10.96 GHz to 10.61 GHz after injecting liquid metal while maintaining absorptivity higher than 98%.

Published
2015

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