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

N. A. Nikolaev; A. A. Rybak; S. A. Kuznetsov

doi:10.1088/1742-6596/1461/1/012118

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 journal › Conference article › peer-review

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
Article number	012118
Number of pages	4
Journal	Journal of Physics: Conference Series
Volume	1461
Issue number	1
DOIs	https://doi.org/10.1088/1742-6596/1461/1/012118
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

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title = "Application of metasurface-based low-pass filters for improving THz-TDS characteristics",

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.",

author = "Nikolaev, {N. A.} and Rybak, {A. A.} and Kuznetsov, {S. A.}",

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AU - Nikolaev, N. A.

AU - Rybak, A. A.

AU - Kuznetsov, S. A.

PY - 2020/4/23

Y1 - 2020/4/23

N2 - 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.

AB - 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.

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