Diabetes and Anemia Prognosis by 2-D Photonic Crystal Biosensor

Abstract

In the presented research, a 2-D optical structure made of photonic crystals is presented. It is based on 30*28 arrays of silicon in medium made of air. Designed system is made of linear media (no nonlinear rods) for overcoming nonlinearity and gain problems. Applicability of designed system can be studied through extracting photonic band gap and field distribution spectra. Latter diagrams would be obtained by utilizing PWE and FDTD techniques. After applying incident light wave, signal can be propagated along the waveguide reaching outputs 1 or 2 according to the resonant wavelengths. Output1 can be considered for diagnosis of glucose levels in blood with Quality factor (Q): (122.72 – 132.5), Sensitivity (S): 1730 nm/RIU, detection limit (DL): (7.01e-4 – 7.15e-4) RIU and Figure of merit (FOM): (134.4 –142.5) RIU⁻¹. In another case, output2 can be considered for diagnosis of hemoglobin levels in blood with (Q): (106.56 – 112.8), (S): 1154.6 nm/RIU, (DL): (1.1e-3 – 1.2e-3) RIU, (FOM): (84.8–87.5) RIU⁻¹. As a result, designed structure would effectively aid researchers in prognosis of diabetes (Output1) and anemia (Output2). Diagnosis of anemia and diabetes (fast and with high precision) in a simple and applicable configuration (made of only linear rods) with considerable characteristics (sensitivity, DL, FOM and Q-factor) are the most important features of the proposed device.