Broadband LWIR and MWIR absorbers by trapezoid multilayered grating and SiO2 hybrid structures

A broadband metamaterial absorber with high absorption simultaneously in the MWIR and LWIR was proposed. In the MWIR, the absorption higher than 0.8 is from 3.26 μm to 4.7 μm, covering the full MWIR transparent window, while the absorption in the LWIR is from 8.46 and 9.9 μm. The broadband absorptio...

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Bibliographic Details
Published in2018 International Conference on Numerical Simulation of Optoelectronic Devices (NUSOD) pp. 41 - 42
Main Authors Li, Yulian, Gao, Jun, An, Bowen
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.11.2018
Subjects
Absorption
Atmosphere
broadband absorber
Broadband communication
Gold
Gratings
Magnetic anisotropy
metamaterial
Metamaterials
phonon polariton resonant
slow-wave effect
transparent atmosphere window
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Summary:A broadband metamaterial absorber with high absorption simultaneously in the MWIR and LWIR was proposed. In the MWIR, the absorption higher than 0.8 is from 3.26 μm to 4.7 μm, covering the full MWIR transparent window, while the absorption in the LWIR is from 8.46 and 9.9 μm. The broadband absorption in the MWIR results from the slow light effect and the broadband absorption in the LWIR is due to the phonon polariton resonant of trapezoid SiO 2 layer. In the broadband high absorption region, the atmosphere are transparent, which may greatly promote the practical application of absorbers in double-color IR imaging, detecting, infrared stealth and thermal emitting.
ISSN:2158-3242
DOI:10.1109/NUSOD.2018.8570220