Journal
NANOSCALE
Volume 12, Issue 17, Pages 9769-9775Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9nr10668e
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Funding
- National Key Research and Development Program of China [2017YFB0406301]
- State Key Laboratory of Electrical Insulation and Power Equipment [EIPE19210]
- Fundamental Research Funds for the Central University
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We propose a method for achieving THz ultra-broadband coherent absorption using the anti-reflection theory of metamaterials. The metamaterial absorber consists of a periodic array of electric ring resonators with a multilayered structure which form the desired refractive index dispersion and provide continuous anti-reflection over a wide frequency range. The destructive interference mechanism and resonance absorption of the absorber are determined by simulation analysis and numerical simulation. Simulation results show that the absorption bandwidth is almost 8.02 THz (absorption rate >90%) over the entire terahertz band (0.1 THz-10 THz). This design provides an effective and viable method for constructing broadband absorbers for stealth technology and the construction of enhanced transmittance devices.
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