Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Research › peer-review
THz gas sensing based on subwavelength rectangular metal grating in attenuated total reflection configuration. / Gerasimov, Vasily V.; Kameshkov, Oleg E.; Knyazev, Boris A.
Synchrotron and Free Electron Laser Radiation: Generation and Application, SFR 2020. ed. / Boris Knyazev; Nikolay Vinokurov. American Institute of Physics Inc., 2020. 030013 (AIP Conference Proceedings; Vol. 2299).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Research › peer-review
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TY - GEN
T1 - THz gas sensing based on subwavelength rectangular metal grating in attenuated total reflection configuration
AU - Gerasimov, Vasily V.
AU - Kameshkov, Oleg E.
AU - Knyazev, Boris A.
N1 - Funding Information: The described numerical simulations were funded by Russian Foundation for Basic Research (grant number 16-32-00678), and will be experimentally tested at the shared research center SSTRC based on the Novosibirsk FEL complex at BINP SB RAS, using equipment supported by project RFMEFI62119X0022. Publisher Copyright: © 2020 American Institute of Physics Inc. All rights reserved. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/11/17
Y1 - 2020/11/17
N2 - The sensing performance of a subwavelength one-dimensional linear rectangular gold grating platform with the attenuate total reflection (Otto) coupling technique for gas detection has been numerically studied in the THz range. Grating parameters optimal for exciting surface plasmon resonances with maximum efficiency were found. Dispersion analysis of surface waves confirmed correctness of reflection spectrum simulations. The fundamental and 1st order modes of deep grooves demonstrated a very high sensitivity to a small refractive index change, up to 1.5 THz/RIU (in the frequency domain) and 557 deg/RIU (in the angular domain), with a refractive index detection limit of the sensor of 7.10-3 RIU and 1.5. 10-7 RIU, respectively. As compared with the fundamental modes, the high-order modes showed greater FOM values (up to 810 1/RIU for the 1st order) due to the sharpness of their resonances. These sensing characteristics are very promising for creating THz sensors based on subwavelength gratings.
AB - The sensing performance of a subwavelength one-dimensional linear rectangular gold grating platform with the attenuate total reflection (Otto) coupling technique for gas detection has been numerically studied in the THz range. Grating parameters optimal for exciting surface plasmon resonances with maximum efficiency were found. Dispersion analysis of surface waves confirmed correctness of reflection spectrum simulations. The fundamental and 1st order modes of deep grooves demonstrated a very high sensitivity to a small refractive index change, up to 1.5 THz/RIU (in the frequency domain) and 557 deg/RIU (in the angular domain), with a refractive index detection limit of the sensor of 7.10-3 RIU and 1.5. 10-7 RIU, respectively. As compared with the fundamental modes, the high-order modes showed greater FOM values (up to 810 1/RIU for the 1st order) due to the sharpness of their resonances. These sensing characteristics are very promising for creating THz sensors based on subwavelength gratings.
UR - http://www.scopus.com/inward/record.url?scp=85096507565&partnerID=8YFLogxK
U2 - 10.1063/5.0030445
DO - 10.1063/5.0030445
M3 - Conference contribution
AN - SCOPUS:85096507565
T3 - AIP Conference Proceedings
BT - Synchrotron and Free Electron Laser Radiation
A2 - Knyazev, Boris
A2 - Vinokurov, Nikolay
PB - American Institute of Physics Inc.
T2 - 2020 Internetional Conference on Synchrotron and Free Electron Laser Radiation: Generation and Application, SFR 2020
Y2 - 13 July 2020 through 16 July 2020
ER -
ID: 26131651