TY - JOUR

T1 - Labyrinth metasurface for biosensing applications

T2 - Numerical study on the new paradigm of metageometries

AU - Jáuregui-López, Irati

AU - Rodríguez-Ulibarri, Pablo

AU - Kuznetsov, Sergei A.

AU - Quemada, Carlos

AU - Beruete, Miguel

PY - 2019/10/2

Y1 - 2019/10/2

N2 - The use of metasurfaces operating in the terahertz regime as biosensor devices has attracted increased interest in recent years due to their enhanced sensitivity and more accurate detection capability. Typical designs are based on the replica of relatively simple unit cells, usually called metaatoms. In a previous paper, we proposed a new paradigm for ultrasensitive thin-film sensors based on complex unit cells, called generically metageometries or labyrinth metasurfaces. Here, we extend this concept towards biosensing, evaluating the performance of the labyrinth as a fungi detector. The sensing capabilities are numerically evaluated and a comparison with previous works in this field is performed, showing that metageometries improve the performance compared to metaatoms both in sensitivity and figure of merit, by a factor of more than four. In particular, we find that it is able to detect five fungi elements scattered on the unit cell, equivalent to a concentration of only 0.004/µm2 .

AB - The use of metasurfaces operating in the terahertz regime as biosensor devices has attracted increased interest in recent years due to their enhanced sensitivity and more accurate detection capability. Typical designs are based on the replica of relatively simple unit cells, usually called metaatoms. In a previous paper, we proposed a new paradigm for ultrasensitive thin-film sensors based on complex unit cells, called generically metageometries or labyrinth metasurfaces. Here, we extend this concept towards biosensing, evaluating the performance of the labyrinth as a fungi detector. The sensing capabilities are numerically evaluated and a comparison with previous works in this field is performed, showing that metageometries improve the performance compared to metaatoms both in sensitivity and figure of merit, by a factor of more than four. In particular, we find that it is able to detect five fungi elements scattered on the unit cell, equivalent to a concentration of only 0.004/µm2 .

KW - Biosensor

KW - Metasurface

KW - Terahertz

KW - biosensor

KW - terahertz

KW - metasurface

UR - http://www.scopus.com/inward/record.url?scp=85073434879&partnerID=8YFLogxK

U2 - 10.3390/s19204396

DO - 10.3390/s19204396

M3 - Article

C2 - 31614489

AN - SCOPUS:85073434879

VL - 19

JO - Sensors

JF - Sensors

SN - 1424-3210

IS - 20

M1 - 4396

ER -