Abstract

We propose a plasmonic sensor with variable refractive index (RI), which exhibits high sensitivity and extraordinary optical transmission (EOT). Its variable RI is attributed to its dielectric layers and metallic slit arrays. According to simulation results, the third resonant wavelength has a wavelength sensitivity of 800 nm/RIU and an ultra-high transmittance of 0.8 by adjusting the RIs of the upper and lower dielectrics, incident light angle, and structural geometric parameters. With its unique features, the proposed structure holds considerable potential for extensive application to metal–dielectric grating sensors operating at visible and near-infrared frequencies.

© 2018 Chinese Laser Press

Efficient terahertz transmission modulation in plasmonic metallic slits by a graphene ribbon array

L. Zhang and Z. C. Zhai
Appl. Opt. 57(32) 9550-9554 (2018)

Compact slit-based couplers for metal-dielectric-metal plasmonic waveguides

Yin Huang, Changjun Min, and Georgios Veronis
Opt. Express 20(20) 22233-22244 (2012)

Coupling of air/metal and substrate/metal surface plasmon polaritons in Au slit arrays fabricated on quartz substrate

S. H. Kim, C. M. Lee, K. J. Ahn, and K. J. Yee
Opt. Express 21(19) 21871-21878 (2013)

Design of a compact and high sensitive refractive index sensor base on metal-insulator-metal plasmonic Bragg grating

Yun Binfeng, Hu Guohua, Zhang Ruohu, and Cui Yiping
Opt. Express 22(23) 28662-28670 (2014)

Active tuning of the hybridization effects of mid-infrared surface plasmon resonance in a black phosphorus sheet array and a metal grating slit

Yan Huang, Yan Liu, Cizhe Fang, Yao Shao, Genquan Han, Jincheng Zhang, and Yue Hao
Opt. Mater. Express 10(1) 14-28 (2020)