Ling Kenyu, Yoo Minyeong, Su Wenjing, Kim Kyeongseob, Cook Benjamin, Tentzeris Manos M, Lim Sungjoon
Opt Express. 2015 Jan 12;23(1):110-20. doi: 10.1364/OE.23.000110.
In this paper, we propose a novel microfluidic tunable metamaterial (MM) absorber printed on a paper substrate in silver nanoparticle ink. The metamaterial is designed using a periodic array consisting of square patches. The conductive patterns are inkjet-printed on paper using silver nanoparticle inks. The microfluidic channels are laser-etched on polymethyl methacrylate (PMMA). The conductive patterns on paper and the microfluidic channels on PMMA are bonded by an SU-8 layer that is also inkjet-printed on the conductive patterns. The proposed MM absorber provides frequency-tuning capability for different fluids in the microfluidic channels. We performed full-wave simulations and measurements that confirmed that the resonant frequency decreased from 4.42 GHz to 3.97 GHz after the injection of distilled water into the microfluidic channels. For both empty and water-filled channels, the absorptivity is higher than 90% at horizontal and vertical polarizations.
在本文中，我们提出了一种新型的微流体可调谐超材料（MM）吸收器，它是用银纳米颗粒墨水印刷在纸质基板上的。该超材料采用由方形贴片组成的周期性阵列进行设计。导电图案使用银纳米颗粒墨水通过喷墨印刷在纸张上。微流体通道是在聚甲基丙烯酸甲酯（PMMA）上激光蚀刻而成的。纸张上的导电图案和PMMA上的微流体通道通过同样通过喷墨印刷在导电图案上的SU - 8层进行粘结。所提出的MM吸收器为微流体通道中的不同流体提供频率调谐能力。我们进行了全波模拟和测量，结果证实，在向微流体通道中注入蒸馏水后，谐振频率从4.42 GHz降至3.97 GHz。对于空通道和充满水的通道，在水平和垂直极化下吸收率均高于90%。
