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Novel terahertz metamaterial absorber with diamond-shaping split ring resonators for dual-purpose refractive index sensing

P. MUKHERJEE1, S. MISHRA2, S. PAHADSINGH3, B. APPASANI3,* , N. BIZON4,5,6

Affiliation

  1. Department of Electrical and Computer Engineering, University of Wisconsin-Madison, USA
  2. School of Electronics Engineering, Kalinga Institute of Industrial Technology, Bhubaneswar 751024, Indi
  3. School of Electronics Engineering, Kalinga Institute of Industrial Technology, Bhubaneswar 751024, India
  4. Pitești University Centre, The National University of Science and Technology POLITEHNICA Bucharest, 110040 Pitesti, Romania
  5. ICSI Energy, National Research and Development Institute for Cryogenic and Isotopic Technologies, 240050 Ramnicu Valcea, Romania
  6. Doctoral School, The National University of Science and Technology POLITEHNICA Bucharest, 110040 Pitesti, Romania

Abstract

The paper proposes a novel design for a metamaterial absorber comprised of eight concentric diamond-shaped split ring resonators (SRR), with splits and gaps introduced to optimize the performance. The sensor is set to operate at the terahertz frequency range to prevent any disturbance in the sensing mechanism. At resonance, a distinct and near-perfect absorption rate of 99.83% is obtained with an FWHM of 0.05 THz. A step-by-step methodology for finding the optimum design is discussed and analyzed through parametric optimization. The paper aims to utilize the design for refractive index sensing applications for biomedical and gas sensing applications. Sensitivities of 1.3 THz/RIU and 1.8 THz/RIU are obtained for bio-medical and gas detection, respectively. Thus, the sensor achieves dual-purpose refractive index sensing with high absorption in biomedical applications like cancer detection and the detection of gases..

Keywords

Metamaterial absorber, Refractive index sensing, Split-ring resonators, Bio-medical, Gas detection.

Submitted at: Oct. 4, 2023
Accepted at: Oct. 7, 2004

Citation

P. MUKHERJEE, S. MISHRA, S. PAHADSINGH, B. APPASANI, N. BIZON, Novel terahertz metamaterial absorber with diamond-shaping split ring resonators for dual-purpose refractive index sensing, Journal of Optoelectronics and Advanced Materials Vol. 26, Iss. 9-10, pp. 355-361 (2024)