时域有限差分法
材料科学
光子晶体
负折射
生物传感器
折射率
折射
光学
六方晶系
六边形晶格
传输(电信)
波导管
灵敏度(控制系统)
光电子学
纳米技术
物理
化学
凝聚态物理
电信
结晶学
计算机科学
反铁磁性
工程类
电子工程
作者
Narges Malmir,Kiazand Fasihi
标识
DOI:10.1080/09500340.2017.1346828
摘要
In this work, we present a novel high-sensitive optical label-free biosensor based on a two-dimensional photonic crystal (2D PC). The suggested structure is composed of a negative refraction structure in a hexagonal lattice PC, along with a positive refraction structure which is arranged in a square lattice PC. The frequency shift of the transmission peak is measured respect to the changes of refractive indices of the studied materials (the blood plasma, water, dry air and normal air). The studied materials are filled into a W1 line-defect waveguide which is located in the PC structure with positive refraction (the microfluidic nanochannel). Our numerical simulations, which are based on finite-difference time-domain (FDTD) method, show that in the proposed structure, a sensitivity about 1100 nm/RIU and a transmission efficiency more than 75% can be achieved. With this design, to the best of our knowledge, the obtained sensitivity and the transmission efficiency are one of the highest values in the reported PC label-free biosensors.
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