EIA metamaterials based on hybrid metal/dielectric structures with dark-mode-enhanced absorption

Optics Express
Fuli ZhangQiang Li

Abstract

Metamaterial analogue of electromagnetically induced absorption (EIA) has promising applications in spectroscopy and sensing. Here we propose an EIA metamaterial based on hybrid metal/dielectric structures, which are composed of a metallic wire and a dielectric block, and investigate the EIA-like effect by simulations, experiments, and the two-oscillator model. An EIA-like effect emerges in virtue of the near-field coupling between metallic wire and dielectric block, and the dielectric block exhibiting magnetic dipolar resonance makes a major contribution to the resonance absorption. The magnetic flux through the dielectric block engendered by the near filed of the metallic wire determines the coupling between dielectric block and metallic wire. With the variation of the separation between dielectric block and metallic wire, the EIA-like effect is preserved and does not convert into the EIT-like effect although the coupling and consequently the absorbance are altered. Based on the two-oscillator model, the absorption spectrum of the EIA metamaterial is quantitatively analyzed and the parameters of the oscillator system are retrieved.

References

Dec 17, 2004·Physical Review Letters·Mehmet Fatih YanikShanhui Fan
Sep 4, 2008·Physical Review Letters·Shuang ZhangXiang Zhang
Dec 31, 2008·Physical Review Letters·N PapasimakisS L Prosvirnin
Mar 5, 2009·Physical Review Letters·P TassinC M Soukoulis
Apr 1, 2009·Optics Express·Philippe TassinC M Soukoulis
Jun 7, 2011·Optics Express·Zhongyang LiWeili Zhang
Jan 26, 2012·Nano Letters·Richard TaubertHarald Giessen
Dec 17, 2014·Nature Communications·Yuanmu YangJason Valentine
May 30, 2015·Scientific Reports·Xueqian ZhangWeili Zhang
Jul 15, 2016·Optics Express·Quanhong FuBotao Kong
May 2, 2018·Applied Optics·Yong LiLing-Ling Wang

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