@inproceedings{4231bdea0cad48f08f159fbae1ef41af,
title = "THz gas sensing based on subwavelength rectangular metal grating in attenuated total reflection configuration",
abstract = "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.",
author = "Gerasimov, {Vasily V.} and Kameshkov, {Oleg E.} and Knyazev, {Boris A.}",
note = "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: {\textcopyright} 2020 American Institute of Physics Inc. All rights reserved. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.; 2020 Internetional Conference on Synchrotron and Free Electron Laser Radiation: Generation and Application, SFR 2020 ; Conference date: 13-07-2020 Through 16-07-2020",
year = "2020",
month = nov,
day = "17",
doi = "10.1063/5.0030445",
language = "English",
series = "AIP Conference Proceedings",
publisher = "American Institute of Physics Inc.",
editor = "Boris Knyazev and Nikolay Vinokurov",
booktitle = "Synchrotron and Free Electron Laser Radiation",
}