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Photonic crystal based bio-sensor detection in cancer cell using FDTD method

A biosensor is an analytical device that is used to detect the bio molecules from a sample. A two-dimensional photonic crystal based biosensor has been proposed for the cancer detection. The sensing mechanism of biosensor is used to change the refractive index of analytes which led to shifting in transmission. Different refractive index of cancer cells have been taken with respect to different type of cancer cell sample. The layout of biosensor consists a linear waveguide with square symmetry type of nanocavity. For the proposed photonic based biosensor, the band gap from 1320 nm to 1951 nm and input wavelength of 1550 nm are used in this design. The finite difference time domain (FDTD) method and plane wave expansion method are applied to analyze the presented biosensors that provide all simulation results and bandgap calculation respectively.