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ultrahigh-q and polarization-independent terahertz metamaterial perfect absorber
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نویسنده
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wang jing ,hu chengpeng ,tian qi ,yu wenxiu ,tian hao ,li li ,liu jianlong ,zhou zhongxiang
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منبع
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plasmonics - 2020 - دوره : 15 - شماره : 6 - صفحه:1943 -1947
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چکیده
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Ensuring a good trade-off between high-quality factor (q-factor) and polarization independency is a key challenge for designing practicable terahertz metamaterial devices. we propose a symmetric composite aluminum-structured metamaterial absorber to achieve high q-factor beyond 80 and near-unity absorbance of arbitrary polarization waves in the terahertz regime. ultrahigh q-factor reaches 84, and polarization-independent absorption is as high as 99% for resonant frequency tuning from 7.58 to 8.97 thz, covering 14% of the standard thz gap. the geometric effect of the symmetric sublattice on resonant frequency tuning is analyzed. the large q-factor and strong absorption by oblique incidence is discussed. designed high-q metamaterial perfect absorber has various applications, including terahertz hyperspectral imaging, filtering, and sensing.
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کلیدواژه
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metamaterial absorber ,terahertz ,high q-factor ,wide-angle absorption
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آدرس
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harbin institute of technology, department of physics, china, harbin institute of technology, department of physics, china, harbin institute of technology, department of physics, china, harbin institute of technology, department of physics, china, harbin institute of technology, department of physics, china, key lab of in-fiber integrated optics of ministry of education, harbin engineering university, china, harbin institute of technology, department of physics, china, harbin institute of technology, department of physics, china
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Authors
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