IEEE Transactions on Applied Superconductivity, volume 32, issue 4, pages 1-6
Dispersive Spectrometry At Terahertz Frequencies for Probing the Quality of NbTiN Superconducting Films
Publication type: Journal Article
Publication date: 2022-06-01
Quartile SCImago
Q2
Quartile WOS
Q3
Impact factor: 1.8
ISSN: 10518223
Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering
Abstract
We present the quality measurements of thick (thicker than London penetration depth) NbTiN superconducting films at Terahertz frequencies using a Dispersive Fourier Transform Spectrometer (DFTS). The reflected RF signal from the tested film was measured in time domain, allowing us to separate it from other reflections. The complex conductivity of the film depends on frequency and determines the reflection coefficient. By comparing the film reflection in superconducting state (film temperature below Tc ) with that of the normal state (film temperature above Tc ), we characterized the film quality at terahertz frequencies, and directly probed the energy of the superconducting gap of the tested film. The experimental results were fitted using the extended Mattis-Bardeen theory and th obtained film parameters show a good agreement with the literature. In addition to the DFTS, we have also measured the properties of NbTiN film using Time Domain Spectroscopy (TDS). It is shown that both TDS and DFTS provide similar results, and both techniques can be used for the quality control of thick NbTiN films. The superconducting gap determined from the measurements by both DFTS and TDS are in good agreement for both solid and meshed films showing that there is no remarkable degradation in the film quality due to technological processes of lift-off or ion etching.
Citations by journals
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IEEE Transactions on Terahertz Science and Technology
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IEEE Transactions on Terahertz Science and Technology
1 publication, 25%
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Journal of Communications Technology and Electronics
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Journal of Communications Technology and Electronics
1 publication, 25%
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IEEE Transactions on Applied Superconductivity
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IEEE Transactions on Applied Superconductivity
1 publication, 25%
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1
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Citations by publishers
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IEEE
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IEEE
3 publications, 75%
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Pleiades Publishing
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Pleiades Publishing
1 publication, 25%
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1
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3
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Khudchenko A. et al. Dispersive Spectrometry At Terahertz Frequencies for Probing the Quality of NbTiN Superconducting Films // IEEE Transactions on Applied Superconductivity. 2022. Vol. 32. No. 4. pp. 1-6.
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Khudchenko A., Lap B. N. R., Rudakov K., Hesper R., Koshelets V., Dmitriev P., Chekushkin A., Khan F., Zhukova E. S., Kadyrov L., Gorshunov B., Baryshev A. M. Dispersive Spectrometry At Terahertz Frequencies for Probing the Quality of NbTiN Superconducting Films // IEEE Transactions on Applied Superconductivity. 2022. Vol. 32. No. 4. pp. 1-6.
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TY - JOUR
DO - 10.1109/TASC.2022.3147736
UR - https://doi.org/10.1109%2FTASC.2022.3147736
TI - Dispersive Spectrometry At Terahertz Frequencies for Probing the Quality of NbTiN Superconducting Films
T2 - IEEE Transactions on Applied Superconductivity
AU - Khudchenko, A.
AU - Lap, B N R
AU - Rudakov, K.I.
AU - Hesper, Ronald
AU - Koshelets, V.P
AU - Dmitriev, P.N.
AU - Chekushkin, A.
AU - Khan, F
AU - Zhukova, E S
AU - Kadyrov, L.S.
AU - Gorshunov, B.P.
AU - Baryshev, A M
PY - 2022
DA - 2022/06/01 00:00:00
PB - IEEE
SP - 1-6
IS - 4
VL - 32
SN - 1051-8223
ER -
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@article{2022_Khudchenko,
author = {A. Khudchenko and B N R Lap and K.I. Rudakov and Ronald Hesper and V.P Koshelets and P.N. Dmitriev and A. Chekushkin and F Khan and E S Zhukova and L.S. Kadyrov and B.P. Gorshunov and A M Baryshev},
title = {Dispersive Spectrometry At Terahertz Frequencies for Probing the Quality of NbTiN Superconducting Films},
journal = {IEEE Transactions on Applied Superconductivity},
year = {2022},
volume = {32},
publisher = {IEEE},
month = {jun},
url = {https://doi.org/10.1109%2FTASC.2022.3147736},
number = {4},
pages = {1--6},
doi = {10.1109/TASC.2022.3147736}
}
Cite this
MLA
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Khudchenko, A., et al. “Dispersive Spectrometry At Terahertz Frequencies for Probing the Quality of NbTiN Superconducting Films.” IEEE Transactions on Applied Superconductivity, vol. 32, no. 4, Jun. 2022, pp. 1-6. https://doi.org/10.1109%2FTASC.2022.3147736.