Title :
Enhanced sensitivity in periodically coupled antenna sensors
Author :
Sang-Yeon Cho ; Briscoe, Jayson L.
Author_Institution :
Klipsch Sch. of Electr. & Comput. Eng., New Mexico State Univ., Las Cruces, NM, USA
Abstract :
The authors report on an experimental demonstration of sensitivity enhancement in periodically coupled bowtie aperture antenna sensors. Periodic metal nanostructures have been widely used in chemical and biosensing because of their high sensitivity to the surrounding dielectric environment. The demonstrated sensor exploits the near-field enhancement in a bowtie aperture antenna to increase refractive index sensitivity. A conventional nanohole array and a bowtie aperture antenna array were fabricated and experimentally characterized. The measured refractive index sensitivity values of the nanohole array and the antenna array are 410nm/RIU and 628nm/RIU, respectively. This demonstration is an important step towards the development of highly sensitive lab-on-a-chip sensing systems.
Keywords :
antenna arrays; aperture antennas; biosensors; chemical sensors; dielectric devices; lab-on-a-chip; nanofabrication; nanosensors; nanostructured materials; optical sensors; refractive index measurement; sensor arrays; biosensing; chemical sensor; dielectric environment; lab-on-a-chip sensing system; nanohole array; near-field enhancement; periodic metal nanostructure; periodically coupled bowtie aperture antenna sensor array; refractive index sensitivity measurement; sensitivity enhancement; Apertures; Arrays; Plasmons; Refractive index; Sensitivity; Sensors;
Conference_Titel :
SENSORS, 2014 IEEE
Conference_Location :
Valencia
DOI :
10.1109/ICSENS.2014.6985400
