Metamaterial Absorber for Electromagnetic Waves in Periodic Water Droplets

被引：200
作者：
Yoo, Young Joon [1 ,2 ]
Ju, Sanghyun [3 ]
Park, Sang Yoon [4 ]
Kim, Young Ju [1 ,2 ]
Bong, Jihye [3 ]
Lim, Taekyung [3 ]
Kim, Ki Won [5 ]
Rhee, Joo Yull [6 ]
Lee, YoungPak [1 ,2 ]
机构：
[1] Hanyang Univ, Dept Phys, Seoul 133791, South Korea
[2] Hanyang Univ, RINS, Seoul 133791, South Korea
[3] Kyonggi Univ, Dept Phys, Suwon, South Korea
[4] Seoul Natl Univ, Adv Inst Convergence Technol, Suwon, South Korea
[5] Sunmoon Univ, Dept Display Informat, Asan, South Korea
[6] Sungkyunkwan Univ, Dept Phys, Suwon, South Korea
来源：
SCIENTIFIC REPORTS | 2015年 / 5卷
基金：
新加坡国家研究基金会;
关键词：
NEGATIVE INDEX;
D O I：
10.1038/srep14018
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
Perfect metamaterial absorber (PMA) can intercept electromagnetic wave harmful for body in Wi-Fi, cell phones and home appliances that we are daily using and provide stealth function that military fighter, tank and warship can avoid radar detection. We reported new concept of water droplet-based PMA absorbing perfectly electromagnetic wave with water, an eco-friendly material which is very plentiful on the earth. If arranging water droplets with particular height and diameter on material surface through the wettability of material surface, meta-properties absorbing electromagnetic wave perfectly in GHz wide-band were shown. It was possible to control absorption ratio and absorption wavelength band of electromagnetic wave according to the shape of water droplet-height and diameter-and apply to various flexible and/or transparent substrates such as plastic, glass and paper. In addition, this research examined how electromagnetic wave can be well absorbed in water droplets with low electrical conductivity unlike metal-based metamaterials inquiring highly electrical conductivity. Those results are judged to lead broad applications to variously civilian and military products in the future by providing perfect absorber of broadband in all products including transparent and bendable materials.
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页数：8
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