A dual-band simple graphene-based absorber for refractive index sensing applications

被引：6
|
作者：
Alizadeh, Somayeh [1 ]
Zareian-Jahromi, Ehsan [1 ]
Mashayekhi, Valiollah [2 ]
机构：
[1] Shiraz Univ Technol, Dept Elect Engn, Shiraz, Iran
[2] Shahrood Univ Technol, Dept Elect Engn, Shahrood, Iran
来源：
OPTICAL AND QUANTUM ELECTRONICS | 2022年 / 54卷 / 12期
关键词：
Graphene; Refractive index sensor; Metamaterial; Bowtie; TUNABLE TERAHERTZ SENSOR; METAMATERIAL ABSORBER; METASURFACE;
D O I：
10.1007/s11082-022-04256-9
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A dual-band tunable metamaterial unit cell is presented as a refractive index sensor. Two resonance peaks at 13.41 and 16.36 THz have been achieved with almost unity absorption peaks. The unit cell has a simple structure consisting of three graphene bowties separated from a bottom gold layer by a SiO2 substrate. The structure results in sensitivity values of 3.56 and 4.76 THz/RIU whereas figure of merits of 20.30 and 24.74 RIU-1 are obtained considering the first and second operational modes, respectively. The presented sensor has a great potential for various medical diagnosis and biomedical applications.
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收藏
页数：13
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