Hybrid Plasmonic Biosensor for Simultaneous Measurement of Both Thickness and Refractive Index

Authors

Youqiao Ma, Technological University Dublin
Gerald Farrell, Technological University DublinFollow
Yuliya Semenova, Technological University DublinFollow
Hau Ping Chan, Technological University Dublin
Qiang wu, Technological University DublinFollow

Document Type

Article

Rights

Available under a Creative Commons Attribution Non-Commercial Share Alike 4.0 International Licence

Disciplines

Bioinformatics

Publication Details

Infrared Physics & Technology, vol. 60, pp. 134–136, 2013

Abstract

A novel hybrid plasmonic biosensor using a sub-wavelength reflection metal grating is proposed and analyzed. The simulation results show that the hybrid plasmonic-cavity (HPCM) are wavelength dependent on both the refractive index (RI) and thickness of the surrounding analyte layer, with a sensitivity of 448 nm/RIU (refractive index unit) and 75 nm/um, respectively. However wavelength related to the cavity resonant mode (CRM) related is only sensitive to the environmental refractive index changes. In principle it is possible to determine both RI and thickness of the coating layer simultaneously.

DOI

https://doi.org/10.1016/j.infrared.2013.04.001.

Recommended Citation

Ma, Y., Farrell, G., Semenova, Y., Chan, H.P. and Wu, Q. Hybrid Plasmonic Biosensor for Simultaneous Measurement of both Thickness and Refractive Index. Infrared Physics & Technology, vol. 60, pp. 134–136, 2013. http://dx.doi.org/10.1016/j.infrared.2013.04.001.