@article{ZHU2020, 
author = {Jiankai ZHU and Xiangxian WANG and Yuan WU and Yingwen SU and Tianxu JIA and Hua YANG and Liping ZHANG and Yunping QI and Xiaolei WEN},
title = {Plasmonic Refractive Index Sensors Based on One- and Two-Dimensional Gold Grating on a Gold Film},
year = {2020},
journal = {Photonic Sensors},
volume = {10},
number = {4},
pages = {375-386},
keywords = {Surface plasmon, refractive index, sensor, grating},
url = {https://www.sciopen.com/article/10.1007/s13320-020-0598-x},
doi = {10.1007/s13320-020-0598-x},
abstract = {In this paper, we propose two kinds of composite structures based on the one- and two-dimensional (1D&2D) gold grating on a gold film for plasmonic refractive index sensing. The resonance modes and sensing characteristics of the composite structures are numerically simulated by the finite-difference time-domain method. The composite structure of the 1D gold semi-cylinder grating and gold film is analyzed first, and the optimized parameters of the grating period are obtained. The sensitivity and figure of merit (FOM) can reach 660RIU/nm and 169RIU−1, respectively. Then, we replace the 1D grating with the 2D gold semi-sphere particles array and find that the 2D grating composite structure can excite strong surface plasmon resonance intensity in a wider period range. The sensitivity and FOM of the improved composite structure can reach 985 RIU/nm and 298 RIU−1, respectively. At last, the comparison results of the sensing performance of the two structures are discussed. The proposed structures can be used for bio-chemical refractive index sensing.}
}