Journal
NANOSCALE RESEARCH LETTERS
Volume 13, Issue -, Pages -Publisher
SPRINGER
DOI: 10.1186/s11671-018-2567-5
Keywords
Metamaterial; Quad-band absorption; Terahertz; Sensing
Funding
- National Natural Science Foundation of China [11647143]
- Natural Science Foundation of Jiangsu Province [BK20160189]
- Jiangsu Provincial Research Center of Light Industrial Optoelectronic Engineering and Technology [BM2014402]
- Fundamental Research Funds for the Central Universities [JUSRP115A13]
- Undergraduate Innovation and Entrepreneurship Training Program of Jiangsu Province of China [2017114Z, 201710295031X]
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Quad-band terahertz absorber with single-sized metamaterial design formed by a perforated rectangular resonator on a gold substrate with a dielectric gap in between is investigated. The designed metamaterial structure enables four absorption peaks, of which the first three peaks have large absorption coefficient while the last peak possesses a high Q (quality factor) value of 98.33. The underlying physical mechanisms of these peaks are explored; it is found that their near-field distributions are different Moreover, the figure of merit (FOM) of the last absorption peak can reach 101.67, which is much higher than that of the first three absorption modes and even absorption bands of other works operated in the terahertz frequency. The designed device with multiple-band absorption and high FOM could provide numerous potential applications in terahertz technology-related fields.
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