Numerical analysis of effective refractive index bio-sensor based on graphene-embedded slot-based dual-micro-ring resonator

被引：4
作者：
Zhao, C. Y. [1 ,2 ]
Chen, P. Y. [1 ]
Li, P. Y. [1 ]
Zhang, C. M. [3 ]
机构：
[1] Hangzhou Dianzi Univ, Coll Sci, Hangzhou, Zhejiang, Peoples R China
[2] Shanxi Univ, Inst Optoelect, State Key Lab Quantum Opt & Quantum Opt Devices, Taiyuan, Peoples R China
[3] Nokia Solut & Networks, Hangzhou 310053, Peoples R China
来源：
INTERNATIONAL JOURNAL OF MODERN PHYSICS B | 2020年 / 34卷 / 17期
基金：
中国国家自然科学基金;
关键词：
Finite-difference time-domain method; bio-sensor; graphene; micro-ring resonator; ELECTROMAGNETICALLY INDUCED TRANSPARENCY; GRATINGS;
D O I：
10.1142/S0217979220501453
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We propose a novel bio-sensor structure composed of slot dual-micro-ring resonators and mono-layer graphene. Based on the electromagnetically induced transparency (EIT)-like phenomenon and the light-absorption characteristics of graphene, we present a theoretical analysis of transmission by using the coupled mode theory and Kubo formula. The results demonstrate the EIT-like spectrum with asymmetric line profile. The modefield distributions of transmission spectrum are obtained from 3D simulations based on finite-difference time-domain (FDTD) method. Our bio-sensor exhibits theoretical sensitivity of 330 nm/RIU, a minimum detection limit of 3.6 x 10(-4) RIU, the maximum extinction ratio of 4.4 dB, the quality factor of 1.288 x 10(3) and a compact structure of 15 mu m x 10 mu m. Finally, the bio-sensor's performance is simulated for glucose solution. Our proposed design provides a promising candidate for on-chip integration with other silicon photonic element.
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页数：11
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