In:
Applied Optics, Optica Publishing Group, Vol. 61, No. 8 ( 2022-03-10), p. 2103-
Abstract:
A novel, to the best of our knowledge, four-band tunable absorber sensor, based on a
graphene layer, is presented. The proposed sensor configuration is composed of a single monolayer of graphene placed on top of a S i O 2 dielectric substrate, whereas a gold
grounding plane is placed beneath the S i O 2 . In addition, the resonant
frequencies of the sensor can be directly controlled by adjusting the Fermi level of graphene, while the absorption rate reaches a value
greater than 99% at all resonant peaks. The acquired calculation results of the refractive index sensitivity of our proposed sensor
show that the four resonant peaks possess superior sensing characteristics. Additionally, by covering the measured objects with
different refractive indices, the acquired results indicate that the sensing performance of the sensor exhibits good linearity. From our
analysis, it is concluded that the absorbing sensor exhibits a broad range of potential applications in the biomedical field.
Type of Medium:
Online Resource
ISSN:
1559-128X
,
2155-3165
Language:
English
Publisher:
Optica Publishing Group
Publication Date:
2022
detail.hit.zdb_id:
207387-0
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