Advances in terahertz metasurface graphene for biosensing and application

Abstract

Based on the extraordinary electromagnetic properties of terahertz waves, such as broadband, low energy, high permeability, and biometric fingerprint spectra, terahertz sensors show great application prospects in the biochemical field. However, the sensitivity of terahertz sensing technology is increasingly required by modern sensing demands. With the development of terahertz technology and functional materials, graphene-based terahertz metasurface sensors with the advantages of high sensitivity, fingerprint identification, nondestructive and anti-interference are gradually gaining attention. In addition to providing ideas for terahertz biosensors, these devices have attracted in-depth research and development by scientists. An overview of graphene-based terahertz metasurfaces and their applications in the detection of biochemical molecules is presented. This includes sensor mechanism research, graphene metasurface index evaluation, protein and nucleic acid sensors, and other chemical molecule sensing. A comparative analysis of graphene, nanomaterials, silicon, and metals to develop material-integrated metasurfaces. Furthermore, a brief summary of the main performance results of this class of devices is presented, along with suggestions for improvements to the existing shortcoming.

Advancements and Perspectives in Optical Biosensors

“…Also, researchers are using the hybridization of the biosensors with various platforms to enhance their performance. Recently, emerging materials such as graphene, − transition metal dichalcogenide (TMDC), , and hybrid (graphene-TMDC) have found their way into substantially developed ultrasensitive plasmonic biosensing compared to conventional bare metallic substrates. The reason behind the performance improvement with graphene and TMDC is that they contribute more electrons to transfer on the sensing surface to enhance the resonance oscillation that contributes to the efficiency of the sensor.…”