Quasi-Freeform Metasurfaces for Wide-Angle Beam Deflecting and Splitting

doi:10.3390/nano13071156

	Quasi-Freeform Metasurfaces for Wide-Angle Beam Deflecting and Splitting
	Zhang, Qiuyu1,2,3 ; Liu, Dingquan1,2,3 ; Zhou, Sheng 1; Chen, Gang 1; Su, Junli1,2 ; Sun, Leihao1,2 ; Xiong, Yunbo1,2 ; Li, Xingyu1,2
	2023-04-01
发表期刊	NANOMATERIALS
EISSN	2079-4991
卷号	13 期号:7
发表状态	已发表
DOI	10.3390/nano13071156
摘要	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.
关键词	metasurface wide-angle beam deflecting beam splitting inverse design
URL	查看原文
收录类别	SCI
语种	英语
资助项目	Natural Science Foundation of Shanghai Municipality, China[17ZR1434900]
WOS研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics
WOS类目	Chemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied
WOS记录号	WOS:000969688500001
出版者	MDPI
引用统计
文献类型	期刊论文
条目标识符	https://kms.shanghaitech.edu.cn/handle/2MSLDSTB/296033
专题	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
通讯作者	Liu, Dingquan
作者单位	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
第一作者单位	物质科学与技术学院
通讯作者单位	物质科学与技术学院
推荐引用方式 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).