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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, Qiling; Zhao, Jiangnan; Ai, Yong
刊名: Optics Letters
出版日期: 2015
卷号: 40, 期号:18, 页码:4285-4288
学科分类: Circular polarization - Dielectric materials - Diffraction gratings - Light polarization - Nanorods - Phase control - Phase modulation - Polarization
DOI: 10.1364/OL.40.004285
通讯作者: Zheng, Guoxing (gxzheng@whu.edu.cn)
文章类型: 期刊论文
中文摘要: 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 × 4 spot arrays with an extending angle of 59° × 59° 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. © 2015 Optical Society of America.
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 × 4 spot arrays with an extending angle of 59° × 59° 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. © 2015 Optical Society of America.
收录类别: SCI ; Ei
项目资助者: National Natural Science Foundation of China (NSFC) [11374235, 11574240] ; Project of Geographic Information for Surveying and Mapping [201412007, 201512016]
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/181551/7331
Appears in Collections:微电子装备总体研究室(四室)_期刊论文

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作者单位: 1. School of Electronic Information, Wuhan University, Wuhan
2.430072, China
3. Cooperative Innovation Center of Geospatial Technology, Wuhan University, Wuhan
4.430079, China
5. Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu
6.610209, 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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