Quasi-Freeform Metasurfaces for Wide-Angle Beam Deflecting and Splitting
2023-04-01
Source PublicationNANOMATERIALS
EISSN2079-4991
Volume13Issue:7
Status已发表
DOI10.3390/nano13071156
AbstractMetasurfaces attracted extensive interests due to their outstanding ability to manipulate the wavefront at a subwavelength scale. In this study, we demonstrated quasi-freeform metasurfaces in which the radius, location, and height of the nanocylinder building blocks were set as optimized structure parameters, providing more degrees of freedom compared with traditional gradient meta-surfaces. Given a desired wavefront shaping objective, these structure parameters can be collectively optimized utilizing a hybrid optimized algorithm. To demonstrate the versatility and feasibility of our method, we firstly proposed metasurfaces with deflecting efficiencies ranging from 86.2% to 94.8%, where the deflecting angles can vary in the range of 29 degrees -75.6 degrees. With further study, we applied our concept to realize a variety of high-efficiency, wide-angle, equal-power beam splitters. The total splitting efficiencies of all the proposed beam splitters exceeded 89.4%, where a highest efficiency of 97.6%, a maximum splitting angle of 75.6 degrees, and a splitting uniformity of 0.33% were obtained. Considering that various deflecting angles, and various splitting channels with different splitting angles, can be realized by setting the optical response of metasurfaces as the optimization target, we believe that our method will provide an alternative approach for metasurfaces to realize desired wavefront shaping.
Keywordmetasurface wide-angle beam deflecting beam splitting inverse design
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Indexed BySCI
Language英语
Funding ProjectNatural Science Foundation of Shanghai Municipality, China[17ZR1434900]
WOS Research AreaChemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS SubjectChemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
WOS IDWOS:000969688500001
PublisherMDPI
Citation statistics
Document Type期刊论文
Identifierhttps://kms.shanghaitech.edu.cn/handle/2MSLDSTB/296033
Collection物质科学与技术学院
物质科学与技术学院_特聘教授组_刘定权组
物质科学与技术学院_硕士生
物质科学与技术学院_本科生
物质科学与技术学院_博士生
Corresponding AuthorLiu, Dingquan
Affiliation
1.Chinese Acad Sci, Shanghai Inst Tech Phys, Shanghai 200083, Peoples R China
2.ShanghaiTech Univ, Sch Phys Sci & Technol, Shanghai 200031, Peoples R China
3.Univ Chinese Acad Sci, Sch Optoelect, Beijing 100049, Peoples R China
First Author AffilicationSchool of Physical Science and Technology
Corresponding Author AffilicationSchool of Physical Science and Technology
Recommended Citation
GB/T 7714
Zhang, Qiuyu,Liu, Dingquan,Zhou, Sheng,et al. Quasi-Freeform Metasurfaces for Wide-Angle Beam Deflecting and Splitting[J]. NANOMATERIALS,2023,13(7).
APA Zhang, Qiuyu.,Liu, Dingquan.,Zhou, Sheng.,Chen, Gang.,Su, Junli.,...&Li, Xingyu.(2023).Quasi-Freeform Metasurfaces for Wide-Angle Beam Deflecting and Splitting.NANOMATERIALS,13(7).
MLA Zhang, Qiuyu,et al."Quasi-Freeform Metasurfaces for Wide-Angle Beam Deflecting and Splitting".NANOMATERIALS 13.7(2023).
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