Design of one dimensional refractive index sensor using ternary photonic crystal waveguide for plasma blood samples applications

Abstract

One dimensional ternary photonic crystal based refractive index sensor is numerically proposed for the blood plasma sensing applications. It is achieved by introducing the defects or cavity cell, where the blood samples are infiltrated and surrounded by the graphene layers at the middle region of the ternary structures. Introduction of the graphene layer is to avoid the change in blood sample characteristics due to few ambient factors. The whole structure is then tuned to observe the transmittance spectrum over the infrared region (800 nm–1200 nm). It is noticed that the resonance spectral shift occurs for variation of the blood plasma samples as 10 g/l, 20 g/l, 30 g/l, 40 g/l & 50 g/l. These spectral shifts report the device sensitivity and it is optimized for different filling factor of nanocomposite material and different thickness of the graphene coating.