Metamaterials-enhanced terahertz time domain spectroscopy for sensing enhancement
The rise in food poisoning outbreaks, coupled with the contamination of fresh seafood by biotoxins has called for a novel method to detect the impurities, including pesticides, in the food we consume. One method is to perform a Terahertz Time-Domain Spectroscopy (THz-TDS) on the suspected samples...
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| Format: | Final Year Project |
| Language: | English |
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Nanyang Technological University
2024
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| Online Access: | https://hdl.handle.net/10356/176448 |
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| Institution: | Nanyang Technological University |
| Language: | English |
| Summary: | The rise in food poisoning outbreaks, coupled with the contamination of fresh seafood by biotoxins has called for a novel method to detect the impurities, including pesticides, in the food we consume.
One method is to perform a Terahertz Time-Domain Spectroscopy (THz-TDS) on the suspected samples to identify the impurities present. However, the detection sensitivity of THz-TDS is limited at present and is usually unable to detect impurities that are present in low concentration. Hence, in this project, we aim to use metamaterials in THz-TDS to enhance the detection sensitivity of such impurities.
In our analysis, the time domain result is Fast Fourier Transformed (FFT) to obtain the frequency-domain spectra. The enhancement in detection sensitivity will be investigated and proven by the increase in frequency shifts between the frequency- domain spectra obtained with and without the low concentration impurities (represented by analytes, which are 1mL of 5mg/mL glucose solution). |
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