期刊
OPTICS EXPRESS
卷 23, 期 5, 页码 6083-6091出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.23.006083
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资金
- National Natural Science Foundations of China [11404291, 11104252]
- Ministry of Education of China [20114101110003]
- fund for Science & Technology innovation team of Zhengzhou [112PCXTD337]
- Key science and technology research project of Henan Province [142102210489]
- Foundation of Henan Educational Committee [14A140004]
A novel plasmonic metamaterial consisting of the solid (bar) and the inverse (slot) compound metallic nanostructure for electromagnetically induced absorption (EIA) is proposed in this paper, which is demonstrated to achieve an ultra-narrow absorption peak with the linewidth less than 8 nm and the absorptivity exceeding 97% at optical frequencies. This is attributed to the plasmonic EIA resonance arising from the efficient coupling between the magnetic response of the slot (dark mode) and the electric resonance of the bar (bright mode). To the best of our knowledge, this is the first time that the plasmonic EIA is used to realize the narrow-band perfect absorbers. The underlying physics are revealed by applying the two-coupled-oscillator model. The near-perfect-absorption resonance also causes an enhancement of about 50 times in H-field and about 130 times in E-field within the slots. Such absorber possesses potential for applications in filter, thermal emitter, surface enhanced Raman scattering, sensing and nonlinear optics. (C) 2015 Optical Society of America
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