Terahertz Metamaterial with Multiple Resonances for Biosensing Application
| Autor: | Zefeng Xu, Fangyuan Lu, Yu-Sheng Lin, Huiliang Ou |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Terahertz radiation General Chemical Engineering Microfluidics 02 engineering and technology environment sensor metamaterial 01 natural sciences Article multiple resonances 010309 optics lcsh:Chemistry 0103 physical sciences Figure of merit General Materials Science Sensitivity (control systems) Plasmon biochemical sensing business.industry Metamaterial 021001 nanoscience & nanotechnology lcsh:QD1-999 Optoelectronics 0210 nano-technology business Biosensor Refractive index |
| Zdroj: | Nanomaterials Volume 10 Issue 6 Nanomaterials, Vol 10, Iss 1038, p 1038 (2020) |
| ISSN: | 2079-4991 |
| DOI: | 10.3390/nano10061038 |
| Popis: | A sickle-shaped metamaterial (SSM) based biochemical sensor with multiple resonances was investigated in the terahertz frequency range. The electromagnetic responses of SSM were found to be four resonances, namely dipolar, quadrupolar, octupolar and hexadecapolar plasmon resonances. They were generated from the interactions between SSM and perpendicularly incident terahertz waves. The sensing performances of SSM-based biochemical sensors were evaluated by changing ambient environments and analyte varieties. The highest values of sensitivity and figure of merit (FOM) for SSM covered with analyte thin-films were 471 GHz/RIU (refraction index unit) and 94 RIU&minus 1, respectively. In order to further investigate the biosensing ability of the proposed SSM device, dielectric hemispheres and microfluidic chips were adopted to imitate dry and hydrous biological specimens, respectively. The results show that the sensing abilities of SSM-based biochemical sensors could be enhanced by increasing either the number of hemispheres or the channel width of the microfluidic chip. The highest sensitivity was 405 GHz/RIU for SSM integrated with microfluidic chips. Finally, three more realistic models were simulated to imitate real sensing situations, and the corresponding highest sensitivity was 502 GHz/RIU. The proposed SSM device paves the way to possible uses in biochemical sensing applications. |
| Databáze: | OpenAIRE |
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