Journal
PLASMONICS
Volume 15, Issue 2, Pages 319-325Publisher
SPRINGER
DOI: 10.1007/s11468-019-01053-1
Keywords
Absorption; Localized surface plasmon; Ultra-broadband; Nanostructures
Funding
- National Nature Science Foundation of China [61967007,61963016]
- Outstanding Youth Talent Project of Jiangxi Provincial [20171BCB23062]
- Jiangxi Provincial Department of Education Science and Technology Research Key Project [GJJ170360]
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In this paper, we propose an ultra-broadband multi-slot cross bowtie (MSCB) nanoantenna for light absorption, whose elements compose of dual rectangles and cross bowtie and rectangular slots. The optical characteristics are analysis numerically by the three-dimensional finite-difference time-domain (FDTD) method. The results show that the average absorptivity of the nanostructure is over 90% in 400-1800-nm waveband, which covered the visible and near-infrared region. We attribute the better absorption property of the nanoantenna to the combining of plasmon coupling effects between slots, high-order modes, and surface plasmon resonance. Our work provides a promising method for the future developments of more advanced absorber for energy harvesting, thermoelectrics, and imaging.
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