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Broadband High-Effi...
Broadband High-Efficiency Half-Wave Plate : A Supercell-Based Plasmonic Metasurface Approach
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Ding, Fei (author)
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Wang, Zhuoxian (author)
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- He, Sailing (author)
- KTH,Elektroteknisk teori och konstruktion,Zhejiang University, China
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Shalaev, Vladimir M. (author)
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Kildishev, Alexander V. (author)
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(creator_code:org_t)
- 2015-04-13
- 2015
- English.
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In: ACS Nano. - : American Chemical Society (ACS). - 1936-0851 .- 1936-086X. ; 9:4, s. 4111-4119
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- We design, fabricate, and experimentally demonstrate an ultrathin, broadband half-wave plate in the near-infrared range using a plasmonic metasurface. The simulated results show that the linear polarization conversion efficiency is over 97% with over 90% reflectance across an 800 nm bandwidth. Moreover, simulated and experimental results indicate that such broadband and high-efficiency performance is also sustained over a wide range of incident angles. To further obtain a background-free half-wave plate, we arrange such a plate as a periodic array of integrated supercells made of several plasmonic antennas with high linear polarization conversion efficiency, consequently achieving a reflection-phase gradient for the cross-polarized beam. In this design, the anomalous (cross-polarized) and the normal (copolarized) reflected beams become spatially separated, hence enabling highly efficient and robust, background-free polarization conversion along with broadband operation. Our results provide strategies for creating compact, integrated, and high-performance plasmonic circuits and devices.
Subject headings
- TEKNIK OCH TEKNOLOGIER -- Nanoteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Nano-technology (hsv//eng)
Keyword
- metasurface
- half-wave plate
- plasmonic antennas
- background-free
Publication and Content Type
- ref (subject category)
- art (subject category)
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