Dual-Band Plasmonic Perfect Absorber Based on Graphene Metamaterials for Refractive Index Sensing Application

Micromachines

卷:10

Yougen Yi¹  Yongjian Tang²  Zao Yi²  Xifang Chen²  Cuiping Liang²  Zigang Zhou²  Pinghui Wu³  Xin Ye⁴  Junqiao Wang⁵ 

[1] College of Physics and Electronics, Central South University, Changsha 410083, China;

[2] Joint Laboratory for Extreme Conditions Matter Properties, Southwest University of Science and Technology, Mianyang 621010, China;

[3] Photonic Technology Research &

[4] Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621010, China;

[5] School of Physics and Engineering and Key Laboratory of Materials Physics of Ministry of Education of China, Zhengzhou University, Zhengzhou 450001, China;

关键词: surface plasmon resonance;    graphene;    refractive index sensor;    metamaterials;   

DOI  :  10.3390/mi10070443

来源: DOAJ

【 摘 要 】

We demonstrate a dual-band plasmonic perfect absorber (PA) based on graphene metamaterials. Two absorption peaks (22.5 μm and 74.5 μm) with the maximal absorption of 99.4% and 99.9% have been achieved, respectively. We utilize this perfect absorber as a plasmonic sensor for refractive index (RI) sensing. It has the figure of merit (FOM) of 10.8 and 3.2, and sensitivities of about 5.6 and 17.2 μm/RIU, respectively. Hence, the designed dual-band PA-based RI sensor exhibits good sensing performance in the infrared regime, which offers great potential applications in various biomedical, tunable spectral detecting, environmental monitoring and medical diagnostics.

【 授权许可】

Unknown