A metamaterial/liquid-core waveguide microfluidic optical sensor
Sensors and Actuators A: Physical
This paper introduces the design of a novel microfluidic refractometric optical sensor. The sensor is able to detect a liquid analyte by converting the change in the refractive index (RI) of the analyte to a shift of resonance peak in the output spectrum. A liquid-core waveguide and gold/dielectric metamaterial are integrated in the sensor design, producing resonance in the waveguide when the light interacts with the metamaterial structure in the core. Finite element analysis is used to simulate the properties of the sensor to optimize the design. Sample sensors are fabricated and tested with liquid analytes which have known refractive indices. Experimental results are well matched to the simulation proving high sensitivity and good repeatability of the sensors. A sensitivity greater than 1280 nm/RIU is achieved by this novel sensor.
Optical sensor, liquid core waveguide, metamaterial
Wu, Yixuan; Meng, Yuan; Yakupoglu, Baha; and Adams, Mark, "A metamaterial/liquid-core waveguide microfluidic optical sensor" (2019). Engineering and Computer Science Faculty Publications. 477.