TY - JOUR

T1 - Comparison of angular-selective metasurfaces as tools for sub-THz single-frequency sensing

AU - Tumashov, M. A.

AU - del Risco, J. P.

AU - Glybovski, S. B.

AU - Sayanskiy, A. D.

AU - Kuznetsov, S. A.

AU - Baena, J. D.

N1 - Funding Information: This work was supported by the Russian Science Foundation (Project 19-79-10260). Publisher Copyright: © 2021 Institute of Physics Publishing. All rights reserved.

PY - 2021/11/17

Y1 - 2021/11/17

N2 - We demonstrate and numerically characterize a set of single-layer metasurfaces based on capacitively-coupled bent metal strips deposited on a thin polypropylene film operating as band-stop filters at 139.1 GHz. Due to a high inter-digital coupling capacitance between neighboring inclusions formed by the strips, the resonance of the metasurface becomes highly sensitive to the incidence angle of a plane wave. At the same time, a narrow-band resonance is achieved by reducing the conductor length along the vertical polarization direction of the incident wave. We propose to use both properties for designing a sensor, which analyses the thickness of a thin slab of a known substance deposited over the structure by tracking the angle at which the minimum of transmission can be measured at a single frequency. We compare three versions of the proposed geometry by numerical calculation of the transmission coefficient depending on both the incidence angle and analyte slab’s thickness. We select the most suitable structure for sensing.

AB - We demonstrate and numerically characterize a set of single-layer metasurfaces based on capacitively-coupled bent metal strips deposited on a thin polypropylene film operating as band-stop filters at 139.1 GHz. Due to a high inter-digital coupling capacitance between neighboring inclusions formed by the strips, the resonance of the metasurface becomes highly sensitive to the incidence angle of a plane wave. At the same time, a narrow-band resonance is achieved by reducing the conductor length along the vertical polarization direction of the incident wave. We propose to use both properties for designing a sensor, which analyses the thickness of a thin slab of a known substance deposited over the structure by tracking the angle at which the minimum of transmission can be measured at a single frequency. We compare three versions of the proposed geometry by numerical calculation of the transmission coefficient depending on both the incidence angle and analyte slab’s thickness. We select the most suitable structure for sensing.

UR - http://www.scopus.com/inward/record.url?scp=85120880737&partnerID=8YFLogxK

U2 - 10.1088/1742-6596/2015/1/012158

DO - 10.1088/1742-6596/2015/1/012158

M3 - Conference article

AN - SCOPUS:85120880737

VL - 2015

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

SN - 1742-6588

IS - 1

M1 - 012158

T2 - 6th International Conference on Metamaterials and Nanophotonics, METANANO 2021

Y2 - 13 September 2021 through 17 September 2021

ER -