Dielectric broadband meta-vector-polarizers based on nematic liquid crystal

Polarizer, as an indispensable optical element, has been widely used in various optical systems, which splits a beam into two beams of orthogonal linear polarizations. Due to the appearance of the vector optical field (VOF) and its unique properties, the vector polarizer also meets the requirement i...

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Veröffentlicht in:APL photonics 2017-12, Vol.2 (12), p.126102-126102-9
Hauptverfasser: Liu, Gui-Geng, Lee, Yun-Han, Huang, Yuge, Zhu, Zheyuan, Tan, Guanjun, Cai, Meng-Qiang, Li, Ping-Ping, Wang, Dan, Li, Yongnan, Pang, Shuo, Tu, Chenghou, Wu, Shin-Tson, Wang, Hui-Tian
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Sprache:eng
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Zusammenfassung:Polarizer, as an indispensable optical element, has been widely used in various optical systems, which splits a beam into two beams of orthogonal linear polarizations. Due to the appearance of the vector optical field (VOF) and its unique properties, the vector polarizer also meets the requirement in a wide variety of applications. Here we present and demonstrate the realization of dielectric broadband vector polarizer, being in fact a liquid-crystal-based space-variant uniaxial crystal (LC-SV-UAC), which is made by a wedged thin cell adhered with space-variant photo-aligned dichroic dye films and filled with the nematic liquid crystal with a thickness of tens of microns. The vector polarizer works based on the birefringent mechanism to spatially separate the orthogonally polarized ordinary and extraordinary beams. The vector polarizers via a LC-SV-UAC have the advantages of mass-production and easy fabrication of large-size and complex structures. In particular, the high-performance broadband vector polarizers we presented and fabricated can not only flexibly tailor the polarization structures and the intensity patterns of optical fields but also act as a high-efficiency generator of VOF, and a key element for realizing the VOF laser and for fabricating the novel photon states in the future.
ISSN:2378-0967
2378-0967
DOI:10.1063/1.5006016