This paper aims at proposing a new design
based on the refractive index using 2D photonic crystals
(PCs) for diagnosing basal cell carcinoma (BCC). This
project consists of a square array of GaAs rods in SiO2.
This structure has two inlet and outlet waveguides and a
micro-cavity. Waveguides are employed to couple light
to the cavity, and the cavity to inject analyte into it. Some
PC rods were used to separate the cavity from the inlet
and outlet waveguides. The results show that by injecting
an analyte into the cavity and changing its refractive
index, a shift occurs in the resonance wavelength of the
transmission spectrum. The high sensitivity coefficient
obtained for this sensor is 730 nm/RIU and its high
Figure of Merit (FoM) is 11428. For numerical analysis
of the transmission spectrum, Q-factor, and sensor
sensitivity, the finite-difference time-domain (FDTD)
method was used. High simplicity, sensitivity, FoM make
it suitable for biosensing applications. تفاصيل المقالة