Omni-directional, broadband and polarization-insensitive thin absorber in the terahertz regime

Details Omni-directional, broadband and polarization-insensitive thin absorber in the terahertz regime Omni-directional, broadband and polarization-insensitive thin absorber in the terahertz regime

2009-06-11

arxiv.org/abs/0906.2137v1

Physics

Optics

6 pages, 8 figures,

Scientific paper

A nearly omni-directional THz absorber for both transverse electric (TE) and transverse magnetic (TM) polarizations is proposed. Through the excitation of magnetic polariton in a metal-dielectric layer, the incident light is perfectly absorbed in a thin thickness which is about 25 times smaller than the resonance wavelength. By simply stacking several such structural layers with different geometrical dimensions, the bandwidth of this strong absorption can be effectively enhanced due to the hybridization of magnetic polaritons in different layers.

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