Dynamically controlled nanofocusing metalens based on graphene-loaded aperiodic silica grating arrays

被引：7

作者：

Lu, Liu ^{[1
]}

Wang, Chenyang ^{[1
]}

Ngiejungbwen, Looh Augustine ^{[1
]}

Zhang, Liang ^{[1
]}

Zhao, Tiantian ^{[1
]}

Chen, Daifen ^{[2
]}

Ren, Xifeng ^{[3
]}

机构：

[1] Jiangsu Univ, Sch Mech Engn, Zhenjiang 212013, Jiangsu, Peoples R China

[2] Jiangsu Univ Sci & Technol, Sch Energy & Power, Zhenjiang 212003, Jiangsu, Peoples R China

[3] Univ Sci & Technol China, Sch Phys Sci, Hefei 230026, Peoples R China

来源：

OPTICS EXPRESS | 2022年 / 30卷 / 04期

基金：

中国国家自然科学基金;

关键词：

BROAD-BAND ABSORPTION; TERAHERTZ; METASURFACES;

D O I：

10.1364/OE.451231

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A new plasmonic nanofocusing metalens based on aperiodic silica grating arrays was designed and investigated. Assisted by the graphene surface plasmon, the infrared polarized light can be focused in a nanospot with a dynamically controlled focal length by varying the dielectric strip width or the graphene Fermi level E-f. For instance, with lambda(0) = 8 mu m and E-f at 0.3, 0.6 and 0.9 eV, focal lengths of 4.5, 3.8 and 3.5 mu m with its corresponding FWHM of 64, 232 and 320 nm, respectively, can be realized. The variation of the focusing efficiency with respect to the incident wavelength and the Fermi level were also investigated. The results of theoretical analysis based on light differential equations agree well with the finite element analysis simulation, which further validate the model. (C) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement

引用

页码：5304 / 5313

页数：10

共 40 条

[1] Subwavelength focusing in the infrared range using different metasurfaces [J].

Abdel-Galil, Manar ;

Ismail, Yehea ;

Swillam, Mohamed .

PHYSICA SCRIPTA, 2019, 94 (11)

[2]

Amnon Y., 2007, OPTICAL ELECT MODERN, P488

[3] Fundamental limits of ultrathin metasurfaces [J].

Arbabi, Amir ;

Faraon, Andrei .

SCIENTIFIC REPORTS, 2017, 7

[4] Subwavelength-thick lenses with high numerical apertures and large efficiency based on high-contrast transmitarrays [J].

Arbabi, Amir ;

Horie, Yu ;

Ball, Alexander J. ;

Bagheri, Mahmood ;

Faraon, Andrei .

NATURE COMMUNICATIONS, 2015, 6

[5] Compact plasmonic lens based on gradually decreasing size and separation nanohole cluster [J].

Ashari-Bavil, Mehdi ;

Dong, Mingli ;

Li, Chuanbo ;

Feng, Shuai ;

Zhu, Lianqing .

JOURNAL OF OPTICS, 2019, 21 (08)

[6] Continuously tunable metasurfaces controlled by single electrode uniform bias-voltage based on nonuniform periodic rectangular graphene arrays [J].

Chen, Dingbo ;

Yang, Junbo ;

Huang, Jie ;

Zhang, Zhaojian ;

Xie, Wanlin ;

Jiang, Xinpeng ;

He, Xin ;

Han, Yunxin ;

Zhang, Zhenfu ;

Yu, Yang .

OPTICS EXPRESS, 2020, 28 (20) :29306-29317

[7] Dual-polarity plasmonic metalens for visible light [J].

Chen, Xianzhong ;

Huang, Lingling ;

Muehlenbernd, Holger ;

Li, Guixin ;

Bai, Benfeng ;

Tan, Qiaofeng ;

Jin, Guofan ;

Qiu, Cheng-Wei ;

Zhang, Shuang ;

Zentgraf, Thomas .

NATURE COMMUNICATIONS, 2012, 3

[8] Enhanced plasmonic field and focusing for ring-shaped nanostructures via radial vector beam [J].

Cui, Wei ;

Li, Li ;

He, Zhihui ;

He, Hui ;

He, Xiaohui ;

Xia, Bin ;

Zhong, Zhenyang ;

Song, Chao ;

Li, Lingqiao ;

Xue, Weiwei ;

Li, Chunjiang ;

Li, Zhenxiong ;

Wang, Xuyang ;

Xu, Hui ;

Liu, Zhimin .

RESULTS IN PHYSICS, 2021, 26

[9]

Deng M., 1987, OPTICAL THEORY PRACT, P90

[10] Graphene nanoribbon based plasmonic Fresnel zone plate lenses [J].

Deng, Sunan ;

Butt, Haider ;

Jiang, Kyle ;

Dlubak, Bruno ;

Kidambi, Piran R. ;

Seneor, Pierre ;

Xavier, Stephane ;

Yetisen, Ali K. .

RSC ADVANCES, 2017, 7 (27) :16594-16601

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