Improved Sensitivity of Ternary 1D Photonic Crystal Biosensor Over Binary Systems for Cancer Cell Detection

This paper presents a novel approach to improving the sensitivity of a cancer cell detection sensor by transforming a one-dimensional (1D) cavity based binary photonic crystal biosensor structure into a 1D ternary cavity photonic crystal structure. This conversion results in a 242% increase in the cancer cell-sensitive output reflection spectrum shift, with a high sensitivity of 1800nm/RIU. Ternary cavity structure leads to more confinement of light in cavity area than binary cavity structure with higher Figure of merit. The higher sensitivity of the 1D cavity based ternary photonic crystal structure enables faster and more accurate detection of cancer cells.