Highly Doped Semiconductor Plasmonic Nanoantenna for Biomedical Sensing

In this paper, we present the analysis and design of an efficient analyte sensor based on Surface Plasmon Resonance. These analytes can be used as biomarkers to detect molecules that lie in mid-infrared. This sensor is based on an array of plasmonic nanoantennas of highly doped Germanium on Silicon Substrate. The proposed plasmonic nanoantenna is CMOS compatible and designed to detect and amplify the molecular absorption lines of a condensed phase analyte called Polydimethylsiloxane. Furthermore, the proposed design demonstrate field enhancement in order up to 20 times of the input signal which leads to detect the fingerprint of different substances with high efficiency and paves the way to integrate for Lab-on-chip applications.