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- W2141105364 abstract "Abstract Versatile devices, especially tunable ones, for terahertz imaging, sensing and high-speed communication, are in high demand. Liquid crystal based components are perfect candidates in the optical range; however, they encounter significant challenges in the terahertz band, particularly the lack of highly transparent electrodes and the drawbacks induced by a thick cell. Here, a strategy to overcome all these challenges is proposed: Few-layer porous graphene is employed as an electrode with a transmittance of more than 98%. A subwavelength metal wire grid is utilized as an integrated high-efficiency electrode and polarizer. The homogeneous alignment of a high-birefringence liquid crystal is implemented on both frail electrodes via a non-contact photo-alignment technique. A tunable terahertz waveplate is thus obtained. Its polarization evolution is directly demonstrated. Furthermore, quarter-wave plates that are electrically controllable over the entire testing range are achieved by stacking two cells. The proposed solution may pave a simple and bright road toward the development of various liquid crystal terahertz apparatuses." @default.
- W2141105364 created "2016-06-24" @default.
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- W2141105364 date "2015-02-27" @default.
- W2141105364 modified "2023-10-16" @default.
- W2141105364 title "Broadband tunable liquid crystal terahertz waveplates driven with porous graphene electrodes" @default.
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- W2141105364 doi "https://doi.org/10.1038/lsa.2015.26" @default.
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