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All-silicon nanorod-based Dammann gratings
Li, Zile1; Zheng, Guoxing1,2; He, Ping'An1; Li, Song1,2; Deng, Qiling; Zhao, Jiangnan; Ai, Yong; Zheng, Guoxing (gxzheng@whu.edu.cn)
Source PublicationOptics Letters
Volume40Issue:18Pages:4285-4288
2015
Language英语
ISSN0146-9592
DOI10.1364/OL.40.004285
Indexed BySCI ; Ei
WOS IDWOS:000361556700025
Subtype期刊论文
AbstractEstablished 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.; 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.
Citation statistics
Cited Times:25[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ioe.ac.cn/handle/181551/7331
Collection微电子装备总体研究室(四室)
Corresponding AuthorZheng, Guoxing (gxzheng@whu.edu.cn)
Affiliation1. 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
GB/T 7714
Li, Zile,Zheng, Guoxing,He, Ping'An,et al. All-silicon nanorod-based Dammann gratings[J]. Optics Letters,2015,40(18):4285-4288.
APA Li, Zile.,Zheng, Guoxing.,He, Ping'An.,Li, Song.,Deng, Qiling.,...&Zheng, Guoxing .(2015).All-silicon nanorod-based Dammann gratings.Optics Letters,40(18),4285-4288.
MLA Li, Zile,et al."All-silicon nanorod-based Dammann gratings".Optics Letters 40.18(2015):4285-4288.
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