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题名:
All-silicon nanorod-based Dammann gratings
作者: Li, Zile1; Zheng, Guoxing1,2; He, Ping'An1; Li, Song1,2; Deng, Qiling3; Zhao, Jiangnan1; Ai, Yong1,2
刊名: OPTICS LETTERS
出版日期: 2015-09-15
卷号: 40, 期号:18, 页码:4285-4288
DOI: 10.1364/OL.40.004285
文章类型: Article
英文摘要: Established diffractive optical elements (DOEs), such as Dammann gratings, whose phase profile is controlled by etching different depths into a transparent dielectric substrate, suffer from a contradiction between the complexity of fabrication procedures and the performance of such gratings. In this Letter, we combine the concept of geometric phase and phase modulation in depth, and prove by theoretical analysis and numerical simulation that nanorod arrays etched on a silicon substrate have a characteristic of strong polarization conversion between two circularly polarized states and can act as a highly efficient half-wave plate. More importantly, only by changing the orientation angles of each nanorod can the arrays control the phase of a circularly polarized light, cell by cell. With the above principle, we report the realization of nanorod-based Dammann gratings reaching diffraction efficiencies of 50%-52% in the C-band fiber telecommunications window (1530-1565 nm). In this design, uniform 4 x 4 spot arrays with an extending angle of 59 degrees x 59 degrees can be obtained in the far field. Because of these advantages of the single-step fabrication procedure, accurate phase controlling, and strong polarization conversion, nanorod-based Dammann gratings could be utilized for various practical applications in a range of fields. (C) 2015 Optical Society of America
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Optics
研究领域[WOS]: Optics
关键词[WOS]: PLASMONIC METASURFACES ; HOLOGRAMS ; PHASE ; GENERATION ; EFFICIENCY
收录类别: SCI
语种: 英语
WOS记录号: WOS:000361556700025
ISSN号: 0146-9592
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ioe.ac.cn/handle/181551/3709
Appears in Collections:光电技术研究所被WoS收录文章_期刊论文

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作者单位: 1.Wuhan Univ, Sch Elect Informat, Wuhan 430072, Peoples R China
2.Wuhan Univ, Cooperat Innovat Ctr Geospatial Technol, Wuhan 430079, Peoples R China
3.Chinese Acad Sci, Inst Opt & Elect, Chengdu 610209, Peoples R China

Recommended Citation:
Li, Zile,Zheng, Guoxing,He, Ping'An,et al. All-silicon nanorod-based Dammann gratings[J]. OPTICS LETTERS,2015,40(18):4285-4288.
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