A graphene based tunable terahertz sensor with double Fano resonances

Autor:	Xiaoyan Huang, Yuping Zhang, Tongtong Li, Huan-Huan Lv, Huiyun Zhang, Abul Kalam Azad, Weili Zhang, Beibei Zeng
Rok vydání:	2015
Předmět:	Materials science business.industry Graphene Terahertz radiation Fermi level Fano resonance Fano plane law.invention symbols.namesake Optics Interference (communication) law symbols Figure of merit General Materials Science business Refractive index
Zdroj:	Nanoscale. 7(29)
ISSN:	2040-3372
Popis:	We propose an ultrasensitive terahertz (THz) sensor consisting of a subwavelength graphene disk and an annular gold ring within a unit cell. The interference between the resonances arising from the graphene disk and the gold ring gives rise to Fano type resonances and enables ultrasensitive sensing. Our full wave electromagnetic simulations show frequency sensitivity as high as 1.9082 THz per refractive index unit (RIU) and a figure of merit (FOM) of 6.5662. Furthermore, the sensing range can be actively tuned by adjusting the Fermi level of graphene.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cce69eeda515dec89f717dac794b45c0 https://pubmed.ncbi.nlm.nih.gov/26148569 Zobrazit plný text záznamu