Tunable Bound States in the Continuum in All-Dielectric Terahertz Metasurfaces | |
Chen, Xu3; Fan, Wenhui1,2,3 | |
刊名 | NANOMATERIALS |
2020-04 | |
卷号 | 10期号:4 |
关键词 | terahertz dielectric metasurfaces graphene quasi-bound states in the continuum tunable |
ISSN号 | 2079-4991 |
DOI | 10.3390/nano10040623 |
产权排序 | 1 |
英文摘要 | In this paper, a tunable terahertz dielectric metasurfaces consisting of split gap bars in the unit cell is proposed and theoretically demonstrated, where the sharp high-quality Fano resonance can be achieved through excitation of quasi-bound states in the continuum (quasi-BIC) by breaking in-plane symmetry of the unit cell structure. With the structural asymmetry parameter decreasing and vanishing, the calculated eigenmodes spectra demonstrate the resonance changes from Fano to symmetry-protected BIC mode, and the radiative quality factors obey the inverse square law. Moreover, combining with graphene monolayer and strontium titanate materials, the quasi-BIC Fano resonance can be tuned independently, where the resonance amplitude can be tuned by adjusting the Fermi level of graphene and the resonance frequency can be tuned by controlling the temperature of strontium titanate materials. The proposed structure has numerous potential applications on tunable devices including modulators, switches, and sensors. |
语种 | 英语 |
出版者 | MDPI |
WOS记录号 | WOS:000539577200026 |
内容类型 | 期刊论文 |
源URL | [http://ir.opt.ac.cn/handle/181661/93553] |
专题 | 西安光学精密机械研究所_瞬态光学技术国家重点实验室 |
通讯作者 | Fan, Wenhui |
作者单位 | 1.Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan 030006, Shanxi, Peoples R China 2.Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China 3.Chinese Acad Sci, State Key Lab Transient Opt & Photon, Xian Inst Opt & Precis Mech, Xian 710119, Shaanxi, Peoples R China |
推荐引用方式 GB/T 7714 | Chen, Xu,Fan, Wenhui. Tunable Bound States in the Continuum in All-Dielectric Terahertz Metasurfaces[J]. NANOMATERIALS,2020,10(4). |
APA | Chen, Xu,&Fan, Wenhui.(2020).Tunable Bound States in the Continuum in All-Dielectric Terahertz Metasurfaces.NANOMATERIALS,10(4). |
MLA | Chen, Xu,et al."Tunable Bound States in the Continuum in All-Dielectric Terahertz Metasurfaces".NANOMATERIALS 10.4(2020). |
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