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And Author="Στέλιος"
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| Title |
Enhancing THz time-domain spectroscopy sensitivity using metamaterials and near-field approaches |
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Author
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Κεραντζόπουλος, Κωνσταντίνος
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Thesis advisor
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Τζωρτζάκης, Στέλιος
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| Abstract |
Pesticides are widely used in agriculture to protect crops from pests and diseases, but their
use can have harmful effects on human health and the environment. Pesticides can cause
acute and chronic health effects, and they can also contaminate soil, water, and air. The
detection of pesticide residues in food products is essential to ensure the safety and quality
of the food supply. Food products are routinely tested for pesticide residues to ensure they
comply with regulatory limits and are safe for human consumption.
In this work, we present a method for detecting pesticides in the THz region with the
use of metamaterials. THz radiation has the potential to detect pesticides due to its ability
to interact with molecular vibrations and rotational transitions in molecules, providing
information on their chemical composition. The operating mechanism of the metamaterial is
based on the concept of a change in the frequency at which it resonates. When the pesticide
molecules come into contact with the metamaterial’s surface, they change the refractive
index of the surrounding medium, which causes a shift in the resonance frequency. Using
THz spectroscopy, it is possible to detect and identify pesticides by measuring the shift in
resonance frequency.
Due to a shortage of time, the data are preliminary, despite that, they show promise
in the detection and identification of pesticides. Further research is needed to optimize
the metamaterial-based sensor’s performance and evaluate its performance under different
experimental conditions.
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| Language |
English |
| Issue date |
2023-03-31 |
| Collection
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School/Department--School of Sciences and Engineering--Department of Physics--Graduate theses
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Type of Work--Graduate theses
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| Permanent Link |
https://elocus.lib.uoc.gr//dlib/8/3/9/metadata-dlib-1678093693-290733-14787.tkl
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| Views |
230 |
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