Journal
APPLIED PHYSICS LETTERS
Volume 105, Issue 4, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4885095
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Funding
- MSIP, Korea [KCA-2013-005-038-001]
- NRF fund by MSIP, Korea [2012 K1A2B2A07033424, 2011-0017605, 2010-0029418]
- MSIP, Korea
- PAL, Korea
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Using a planar and flexible metamaterial (MM), we obtained the low-frequency perfect absorption even with very small unit-cell size in snake-shape structure. These shrunken, deep-sub-wavelength and thin MM absorbers were numerically and experimentally investigated by increasing the inductance. The periodicity/thickness (the figure of merit for perfect absorption) is achieved to be 10 and 2 for single-snake-bar and 5-snake-bar structures, respectively. The ratio between periodicity and resonance wavelength (in mm) is close to 1/12 and 1/30 at 2 GHz and 400 MHz, respectively. The absorbers are specially designed for absorption peaks around 2 GHz and 400 MHz, which can be used for depressing the electromagnetic noise from everyday electronic devices and mobile phones. (C) 2014 AIP Publishing LLC.
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