Abstract
We propose an approach to improve the technical characteristics of terahertz time-domain spectrometers at low-frequency measurements. The approach is based on applying low-pass THz filters to narrow the frequency band of the THz signal that allows increasing the sampling interval in accordance with the Nyquist-Shannon theorem. This concept was verified by studying the transmission spectra of low-frequency band-pass THz filters centered at 156 and 376 GHz. We confirm that the high-quality low-pass filters can improve accuracy of THz measurements and significantly reduce data acquisition time. The reduction up to 12 times was experimentally demonstrated in our case.
Original language | English |
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Article number | 012118 |
Number of pages | 4 |
Journal | Journal of Physics: Conference Series |
Volume | 1461 |
Issue number | 1 |
DOIs | |
Publication status | Published - 23 Apr 2020 |
Event | 4th International Conference on Metamaterials and Nanophotonics, METANANO 2019 - St. Petersburg, Russian Federation Duration: 15 Jul 2019 → 19 Jul 2019 |