Silicon photonics is poised to revolutionize bio-sensing applications, specifically in medical diagnostics. The need for cost effective and reliable bio-sensors in medical applications is an ever growing and everlasting one. In this synopsis we have designed a 2-D hexagonal photonic crystal ring resonator based bio-sensor that is able to detect lung cancer from blood. Simulation and analysis has been done for normal DNA and the cancer affected DNA in blood. The intensity level of transmission spectrum has been observed. Finite Difference Time Domain (FDTD) method is used for analysis. MEEP (MIT Electromagnetic Equation Propagation) tool and RSOFT Photonic Suite CAD tool are used designing the photonic crystal sensor. The results show that for small changes in the refractive index of the input samples there is a significant shift in wavelength and amplitude. Thus the sensor is highly sensitive for change in refractive index and hence differentiating normal and cancer affected DNA.
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