Journal
OPTICS EXPRESS
Volume 26, Issue 17, Pages 21479-21489Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.26.021479
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Funding
- National Natural Science Foundation of China (NSFC) [61575132, 61107016, 61575135, 61505131]
- Key University Science Research Project of Jiangsu Province [14KJA510006]
- NFSC Major Research Program on Nanomanufacturing [91323303]
- Priority Academic Program Development (PAPD) of Jiangsu Higher Education Institutions [BZ2016008]
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We present an omnidirectional broadband metasurface absorber whose dielectric-metal-dielectric layers are modulated by cylinder arrays. The simultaneous excitation of surface plasmon resonance and localized surface plasmon resonance affords an average optical absorption of 0.97 (0.9, experiment), with peak absorption up to 0.99 (0.984, experiment), for the wavelength range of 400-1100 rim, and absorption >0.93 (0.87, experiment) for incident angles up to 60 degrees. The device, which is fabricated by continuously variable spatial frequency photolithography, outperforms previously reported absorbers in cost. Moreover, it exhibits considerably lower emissivity (weak absorption) in the mid-infrared range, which makes it promising for energy harvesting. (C) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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