中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
Tunable Bound States in the Continuum in All-Dielectric Terahertz Metasurfaces

文献类型:期刊论文

作者Chen, Xu1; Fan, Wenhui1,2,3
刊名NANOMATERIALS
出版日期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
DOI10.3390/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
WOS记录号WOS:000539577200026
出版者MDPI
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.Chinese Acad Sci, State Key Lab Transient Opt & Photon, Xian Inst Opt & Precis Mech, Xian 710119, Shaanxi, Peoples R China
2.Univ Chinese Acad Sci, Ctr Mat Sci & Optoelect Engn, Beijing 100049, Peoples R China
3.Shanxi Univ, Collaborat Innovat Ctr Extreme Opt, Taiyuan 030006, Shanxi, 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).

入库方式: OAI收割

来源:西安光学精密机械研究所

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