A graphene based tunable terahertz sensor with double Fano resonances

Yuping Zhang; Tongtong Li; Beibei Zeng; Huiyun Zhang; Huanhuan Lv; Xiaoyan Huang; Weili Zhang; Abul K. Azad

doi:10.1039/c5nr03044g

A graphene based tunable terahertz sensor with double Fano resonances

Yuping Zhang
, Tongtong Li
, Beibei Zeng
, Huiyun Zhang
, Huanhuan Lv
, Xiaoyan Huang
, Weili Zhang
, Abul K. Azad

Research output: Contribution to journal › Article › peer-review

264 Scopus citations

Abstract

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.

Original language	English
Pages (from-to)	12682-12688
Number of pages	7
Journal	Nanoscale
Volume	7
Issue number	29
DOIs	https://doi.org/10.1039/c5nr03044g
State	Published - Jan 1 2015
Externally published	Yes

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title = "A graphene based tunable terahertz sensor with double Fano resonances",

abstract = "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.",

author = "Yuping Zhang and Tongtong Li and Beibei Zeng and Huiyun Zhang and Huanhuan Lv and Xiaoyan Huang and Weili Zhang and Azad, \{Abul K.\}",

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doi = "10.1039/c5nr03044g",

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T1 - A graphene based tunable terahertz sensor with double Fano resonances

AU - Zhang, Yuping

AU - Li, Tongtong

AU - Zeng, Beibei

AU - Zhang, Huiyun

AU - Lv, Huanhuan

AU - Huang, Xiaoyan

AU - Zhang, Weili

AU - Azad, Abul K.

PY - 2015/1/1

Y1 - 2015/1/1

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/84937622557

U2 - 10.1039/c5nr03044g

DO - 10.1039/c5nr03044g

M3 - Article

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VL - 7

SP - 12682

EP - 12688

JO - Nanoscale

JF - Nanoscale

IS - 29

ER -

A graphene based tunable terahertz sensor with double Fano resonances

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