Omnidirectional, polarization-insensitive and broadband thin absorber in the terahertz regime
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- 19 February 2010
- journal article
- research article
- Published by Optica Publishing Group in Journal of the Optical Society of America B
- Vol. 27 (3), 498-504
- https://doi.org/10.1364/josab.27.000498
Abstract
A nearly omnidirectional THz absorber for both transverse electric (TE) and transverse magnetic (TM) polarizations is proposed. Through the excitation of the magnetic polariton in a metal-dielectric layer, the incident light is perfectly absorbed in a thin thickness that 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.Keywords
Funding Information
- National Basic Research Program (973 Program) of China (2004CB719800)
- National Natural Science Foundation of China (NNSFC) (60901039)
- Swedish Research Council (VR)
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