Journal
APPLIED PHYSICS LETTERS
Volume 105, Issue 3, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4890617
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Funding
- National Program on Key Basic Research Project of China (973 Program) [2014CB339806]
- Basic Research Key Project [12JC1407100]
- Major National Development Project of Scientific Instrument and Equipment [2011YQ150021, 2012YQ14000504]
- National Natural Science Foundation of China [11174207, 61138001, 61205094, 61307126]
- Shanghai Rising-Star Program [14QA1403100]
- Program of Shanghai Subject Chief Scientist [14XD1403000]
- Scientific Research Innovation Project of Shanghai Municipal Education Commission [14YZ093]
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A highly efficient broadband terahertz absorber is designed, fabricated, and experimentally as well as theoretically evaluated. The absorber comprises a heavily doped silicon substrate and a well-designed two-dimensional grating. Due to the destructive interference of waves and diffraction, the absorber can achieve over 95% absorption in a broad frequency range from 1 to 2 THz and for angles of incidence from 0 degrees to 60 degrees. Such a terahertz absorber is also polarization-independent due to its symmetrical structure. This omnidirectional and broadband absorber have potential applications in anti-reflection coatings, imaging systems, and so on. (C) 2014 AIP Publishing LLC.
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