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A polarization insensitive multiband absorber as a biosensor for cancer detection

BALU ASHVANTH1,* , BACTAVATCHALAME PARTIBANE2

Affiliation

  1. Dept. of ECE, Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology, Chennai-62, India
  2. Dept. of ECE, Sri Sivasubramaniya Nadar College of Engineering, Chennai-110, India

Abstract

The design and analysis of a multiband absorber that produces ten absorption peaks between 1GHz and 20GHz is discussed in this work. Perfect absorption over the operational bands is ensured by the majority of absorption bands, which exceed 90% absorptivity. The suggested absorber has a 1.6 mm thick FR4 substrate with a 10 mm by 10 mm unit cell dimension. It is made symmetric in XY plane which makes it insensitive to angle of incidence and polarization of striking electromagnetic wave. The miniaturized version of this absorber is designed to operate in THz spectrum. The sharpness of the absorption peaks brings sensing capability to the absorber and thus finds its application as a biosensor. The vast potential of this absorber in accurate sensing of different refractive index (RI) of human muscles helps in detecting various cancer cells that is confirmed with analytic results. The maximum sensitivity of this biosensor is found to be 6.43THz/RIU for detecting breast cancer. The designed absorber is fabricated with printed circuit board fabrication technology and its performance is experimentally validated that aligns with the simulation results..

Keywords

Multiband absorber, Biosensor, Absorptivity, Refractive index.

Submitted at: Nov. 6, 2024
Accepted at: June 4, 2025

Citation

BALU ASHVANTH, BACTAVATCHALAME PARTIBANE, A polarization insensitive multiband absorber as a biosensor for cancer detection, Journal of Optoelectronics and Advanced Materials Vol. 27, Iss. 5-6, pp. 244-254 (2025)