A plethora of research in recent years has been reported on biosensing in the surface plasmon resonant systems. However, very little research has reported a tunable and highly sensitive biosensor in a nanoscale platform. In this regard, we propose a nanoscale hyperbolic metamaterial (HMM)-based prism coupled waveguide sensor (PCWS) in the near-infrared range. The HMM layer makes up one of the constituents of the PCWS—comprised of a periodically arranged assembly of silver nanostrips. The structure is numerically simulated by the finite difference time domain method. It is demonstrated that the sensitivity of the reflected light can be tuned through the refractive index (RI) of the solution. Moreover, the effects of alteration of constituents of PCWS on the sensitivity have been analyzed. Results show that the sensitivity of PCWS can be harnessed by altering the thickness, slant angle of HMM layer, volume fraction () of metal in the HMM layer, and the incidence angle of light. For this purpose, the structure is numerically simulated by the finite difference time domain method. In the optimum design of the proposed sensor, the maximum value of sensitivity is achieved as high as index unit with and and a metamaterial thickness of 250 nm. Moreover, the structure has a nanoscale footprint of .
© 2018 Optical Society of AmericaFull Article | PDF Article
OSA Recommended Articles
Maziar Shoaei, Mohammad Kazem Moravvej-Farshi, and Leila Yousefi
J. Opt. Soc. Am. B 32(11) 2358-2365 (2015)
J. Opt. Soc. Am. B 36(2) 401-407 (2019)
Jiaju Wu, Feng Wu, Chunhua Xue, Zhiwei Guo, Haitao Jiang, Yong Sun, Yunhui Li, and Hong Chen
Opt. Express 27(17) 24835-24846 (2019)