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Exploring performance of THz metamaterial biosensor based on flexible thin-film
Optics Express
|September 10, 2020
Summary
This study presents a flexible metamaterial biosensor for terahertz applications. The novel design achieves high sensitivity and a high quality (Q) factor, offering improved performance for biosensing.
Area of Science:
- Physics
- Materials Science
- Biotechnology
Background:
- Metamaterials offer unique electromagnetic properties.
- Flexible biosensors are crucial for advanced diagnostics.
- Terahertz technology enables label-free biosensing.
Purpose of the Study:
- To develop a flexible metamaterial biosensor for terahertz applications.
- To investigate the impact of structural parameters on biosensor performance.
- To enhance sensitivity, quality (Q) factor, and figure of merit (FOM).
Main Methods:
- Fabrication of a metamaterial biosensor using a flexible parylene-c thin-film.
- Utilized an array of metal elliptical split-ring resonators with subwavelength structure.
- Analyzed the influence of structural parameters and incident light polarization.
- Studied the effect of sample permittivity on transmission spectra shift.
Main Results:
- Achieved a sensitivity of 243 GHz/RIU.
- Obtained a quality (Q) factor of 14.2 and a figure of merit (FOM) of 3.3.
- Demonstrated a narrow full-width-half-maximum (FWHM) of 82 GHz.
- Confirmed the tunability of transmission spectra based on sample permittivity.
Conclusions:
- The flexible metamaterial biosensor shows significant potential for terahertz biosensing.
- Optimized structural parameters lead to enhanced biosensor performance.
- This work provides a pathway for designing high-performance metamaterial biosensors.
