High Q-factor 2D PCMicrocavity Ring Resonator Based Biosensor for Biomedical Applications

Abstract

In this paper, a sensor based on 2DPC microcavity ring resonator is illustrated and designed to identify the glucose concentration in urine, over the range of 0 gm/dl-15 gm/dl. The proposed sensor is consisted of input and output straight waveguides connected to a hexagonal-shaped microcavity ring resonator. The radii of selected holes in the microcavity are altered in such a way that Q factor is increased and achieved a maximum Q factor of 8894. The obtained sensitivity and detection limit of the sensor are 107 nm/RIU and 2.4299 x 10-3 RIU respectively. FDTD method has been used for modeling and designing of PhC. The wavelength shift is observed if the refractive index of urine is varied by varying the glucose concentration in urine. This principle is used for the detection of glucose concentration in urine. The size of the proposed sensor is about 13 μm × 9.9 μm.