材料科学
液态金属
镓
铟
共晶体系
合金
光电子学
超材料
微流控
复合材料
冶金
纳米技术
作者
K.S. Ling,Hyung Ki Kim,Minyeong Yoo,Sungjoon Lim
出处
期刊:Sensors
[MDPI AG]
日期:2015-11-06
卷期号:15 (11): 28154-28165
被引量:48
摘要
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%.
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