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| Quasi-Freeform Metasurfaces for Wide-Angle Beam Deflecting and Splitting | |
| 2023-04-01 | |
| Source Publication | NANOMATERIALS
 |
| EISSN | 2079-4991 |
| Volume | 13Issue:7 |
| Status | 已发表 |
| DOI | 10.3390/nano13071156 |
| Abstract | Metasurfaces 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. |
| Keyword | metasurface wide-angle beam deflecting beam splitting inverse design |
| URL | 查看原文 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | Natural Science Foundation of Shanghai Municipality, China[17ZR1434900] |
| WOS Research Area | Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics |
| WOS Subject | Chemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied |
| WOS ID | WOS:000969688500001 |
| Publisher | MDPI |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | https://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 Author | Liu, 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 Affilication | School of Physical Science and Technology |
| Corresponding Author Affilication | School 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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