Encrypted and tunable graphene‐based metasurface refractive index sensor

Abstract

Encryption is a very essential part to secure data communication in today's world where there is a threat of stealing data. We have proposed a graphene-based metasurface biosensor for sensing and encryption applications. The biosensor is designed to sense the hemoglobin (HT) biomolecules with high sensitivity. The results are analyzed in the form of transmittance and electric field of the proposed graphenebased metasurface biosensor. The graphene layer's chemical potential is varied to achieve the coding of '0' and '1'. This creates one-digit coding. The array of this proposed structure with this coding can be used for encryption applications. The biosensor design is analyzed for four HT concentrations and their sensitivity is compared. Different geometrical parameters are analyzed and their effect is observed for tunability. The response from the design can be useful in future biomedical and data encryption applications.

Metamaterial‐based refractive index sensor using Ge2Sb2Te5 substrate for glucose detection

“…The sensitivity (S) of the biosensor is computed as a ratio of the changes in wavelength (∆ω) to changes in refractive index ΔRI as described in Parmar and Patel. 18 Mathematically it is represented as…”

“…Moreover, observation of these parameters for aGST and cGST is also discussed. The sensitivity ( S ) of the biosensor is computed as a ratio of the changes in wavelength ( $$\unicode{x02206}{\rm{\omega }}$$) to changes in refractive index ΔRI as described in Parmar and Patel 18 . Mathematically it is represented as $$S=\frac{\unicode{x02206}\omega }{\unicode{x02206}\text{RI}}$$.…”

Review on Graphene-based Absorbers for Infrared to Ultraviolet Frequencies

“…Absorber sensors are widely used to observe biomolecules which have wide applications in various elds such as medical, environmental, and industrial, etc. [40]- [42]. There are various kinds of absorber sensors are available i.e., optical [43], [44], electrochemical [45], physical [46].…”

Tunable Wideband Cylindrical Dielectric Resonator Inspired Metasurface Absorber for Medical Sensing Applications

“…The broadband and switchable characteristics covers resonant frequencies of 1.98THz, 2.61THz, 2.95THz, and 3.93THz. A Graphene-based metasurface biosensor to sense the hemoglobin biomolecules with great sensitivity has been proposed for secure data communication and sensing applications [9]. Here, a polarization conversion device using hollow graphene based metasurface with efficient outcomes is discovered [10].…”