Related Experiment Video
Updated: Aug 6, 2025
07:28
Terahertz Microfluidic Sensing Using a Parallel-plate Waveguide Sensor
Published on: August 30, 2012
10.8K
High-performance terahertz refractive index sensor for cancer cells detection
1Department of Physics, Islamia College Peshawar (Chartered University), Peshawar, 25120, Pakistan. shahzadanwar76@gmail.com.
The European Physical Journal. E, Soft Matter
|March 23, 2023
Summary
This study introduces a novel terahertz refractive index sensor using metamaterial absorbers for biomedical sample detection. The sensor achieves high sensitivity and a high figure of merit, making it suitable for identifying cancerous cells.
Area of Science:
- Optics and Photonics
- Materials Science
- Biomedical Engineering
Background:
- Terahertz (THz) metamaterial absorbers are crucial for sensing and detection applications.
- Accurate refractive index sensing is vital for biomedical sample analysis.
Purpose of the Study:
- To develop a novel THz refractive index sensor based on metamaterial absorbers.
- To evaluate its performance for sensing biomedical samples, specifically cancerous cells.
Main Methods:
- Designed a metamaterial absorber structure with three asymmetrical gold resonators on a gallium arsenide (GaAs) dielectric layer.
- Analyzed absorption spectra, Q-factor, and sensitivity to refractive index changes.
Main Results:
- Achieved nearly 100% absorption with four resonance modes and a high Q-factor of 456.5.
- Demonstrated high sensitivity (1.87 THz/RIU) and figure of merit (FOM = 125 RIU⁻¹) in the refractive index range of 1.35–1.39.
- The sensor effectively detected changes in refractive index relevant to cancerous cells.
Conclusions:
- The proposed metamaterial absorber sensor is highly sensitive to refractive index variations.
- It shows significant potential for early-stage detection of cancerous cells in biomedical applications due to its high performance metrics.
