Graphene-Tuned, Tightly Coupled Hybrid Plasmonic Meta-Atoms

Chen, Kai1; Li, Ke2,3; Wang, Yiming1; Zhang, Zihao1; Shi, Yanpeng1; Song, Aimin4,5; Zhang, Yifei1

2024-04-01

10.3390/nano14080713

NANOMATERIALS   影响因子和分区

2079-4991

Tightly coupled meta-atoms (TCMAs) are densely packed metamaterials with unnatural refractive indexes. Actively modulated TCMAs with tunable optical properties have found many applications in beam shaping, holography, and enhanced light-matter interactions. Typically, TCMAs are studied in the classic Bloch theory. Here, tightly coupled H-shaped meta-atoms are proposed with an ultra-high permittivity of similar to 6000, and their active modulation with graphene is designed by using the tightly coupled dipole array (TCDA) theory. The H-shaped meta-atoms are used as dipole arms, and the graphene strips function as the dipole loads. By tuning the chemical potential of graphene, the resonant amplitude, frequency, and permittivity are dynamically modulated. The simulations indicate that the real and imaginary parts of permittivity change from 6854 to 1522 and from 7356 to 2870, respectively. The experimental validation demonstrates a modulation depth of 11.6% in the resonant frequency, i.e., from 219.4 to 195 GHz, and a substantial 52.5% modulation depth in transmittance under a bias voltage of less than 1.5 V.

tightly coupled meta-atom graphene terahertz tightly coupled antenna array plasmonic

SCI

英语

其他

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied

WOS:001211373100001

MDPI

Web of Science

1.Shandong Univ, Shandong Technol Ctr Nanodevices & Integrat, Sch Integrated Circuits, Jinan 250100, Peoples R China
2.Xi An Jiao Tong Univ, Minist Educ, Key Lab Phys Elect & Devices, Xian 710049, Peoples R China
3.Xi An Jiao Tong Univ, Fac Elect & Informat Engn, Sch Elect Sci & Engn, Shaanxi Key Lab Informat Photon Tech, Xian 710049, Peoples R China
4.Southern Univ Sci & Technol, Inst Nanosci & Applicat, Shenzhen 518055, Peoples R China
5.Univ Manchester, Dept Elect & Elect Engn, Manchester M13 9PL, England

Chen, Kai,Li, Ke,Wang, Yiming,et al. Graphene-Tuned, Tightly Coupled Hybrid Plasmonic Meta-Atoms[J]. NANOMATERIALS,2024,14(8).

Chen, Kai.,Li, Ke.,Wang, Yiming.,Zhang, Zihao.,Shi, Yanpeng.,...&Zhang, Yifei.(2024).Graphene-Tuned, Tightly Coupled Hybrid Plasmonic Meta-Atoms.NANOMATERIALS,14(8).

Chen, Kai,et al."Graphene-Tuned, Tightly Coupled Hybrid Plasmonic Meta-Atoms".NANOMATERIALS 14.8(2024).