Research output: Contribution to journal › Article › peer-review
THz sensing with anomalous extraordinary optical transmission hole arrays. / Jáuregui-López, Irati; Rodriguez-Ulibarri, Pablo; Kuznetsov, Sergei A. et al.
In: Sensors, Vol. 18, No. 11, 3848, 09.11.2018.Research output: Contribution to journal › Article › peer-review
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TY - JOUR
T1 - THz sensing with anomalous extraordinary optical transmission hole arrays
AU - Jáuregui-López, Irati
AU - Rodriguez-Ulibarri, Pablo
AU - Kuznetsov, Sergei A.
AU - Nikolaev, Nazar A.
AU - Beruete, Miguel
N1 - Publisher Copyright: © 2018 by the authors. Licensee MDPI, Basel, Switzerland.
PY - 2018/11/9
Y1 - 2018/11/9
N2 - Subwavelength hole array (HA) metasurfaces support the so-called extraordinary optical transmission (EOT) resonance that has already been exploited for sensing. In this work, we demonstrate the superior performance of a different resonant regime of HA metasurfaces called anomalous EOT, by doing a thorough numerical and experimental study of its ability in thin-film label-free sensing applications in the terahertz (THz) band. A comprehensive analysis using both the regular and anomalous EOT resonances is done by depositing thin layers of dielectric analyte slabs of different thicknesses on the structures in different scenarios. We carry out a detailed comparison and demonstrate that the best sensing performance is achieved when the structure operates in the anomalous EOT resonance and the analyte is deposited on the non-patterned side of the metasurface, improving by a factor between 2 and 3 the results of the EOT resonance in any of the considered scenarios. This can be explained by the comparatively narrower linewidth of the anomalous EOT resonance. The results presented expand the reach of subwavelength HAs for sensing applications by considering the anomalous EOT regime that is usually overlooked in the literature.
AB - Subwavelength hole array (HA) metasurfaces support the so-called extraordinary optical transmission (EOT) resonance that has already been exploited for sensing. In this work, we demonstrate the superior performance of a different resonant regime of HA metasurfaces called anomalous EOT, by doing a thorough numerical and experimental study of its ability in thin-film label-free sensing applications in the terahertz (THz) band. A comprehensive analysis using both the regular and anomalous EOT resonances is done by depositing thin layers of dielectric analyte slabs of different thicknesses on the structures in different scenarios. We carry out a detailed comparison and demonstrate that the best sensing performance is achieved when the structure operates in the anomalous EOT resonance and the analyte is deposited on the non-patterned side of the metasurface, improving by a factor between 2 and 3 the results of the EOT resonance in any of the considered scenarios. This can be explained by the comparatively narrower linewidth of the anomalous EOT resonance. The results presented expand the reach of subwavelength HAs for sensing applications by considering the anomalous EOT regime that is usually overlooked in the literature.
KW - Anomalous EOT
KW - Metasurface
KW - Sensing
KW - Terahertz
KW - Thin film
KW - sensing
KW - METAMATERIAL
KW - NANOHOLES
KW - SENSOR
KW - MILLIMETER-WAVE
KW - anomalous EOT
KW - terahertz
KW - thin film
KW - TERAHERTZ
KW - metasurface
UR - http://www.scopus.com/inward/record.url?scp=85056533381&partnerID=8YFLogxK
U2 - 10.3390/s18113848
DO - 10.3390/s18113848
M3 - Article
C2 - 30423974
AN - SCOPUS:85056533381
VL - 18
JO - Sensors
JF - Sensors
SN - 1424-3210
IS - 11
M1 - 3848
ER -
ID: 17473149