Application of metasurface-based low-pass filters for improving THz-TDS characteristics

N. A. Nikolaev, A. A. Rybak, S. A. Kuznetsov

Research output: Contribution to journalConference articlepeer-review


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 languageEnglish
Article number012118
Number of pages4
JournalJournal of Physics: Conference Series
Issue number1
Publication statusPublished - 23 Apr 2020
Event4th International Conference on Metamaterials and Nanophotonics, METANANO 2019 - St. Petersburg, Russian Federation
Duration: 15 Jul 201919 Jul 2019


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