Photonic Crystal Based Biosensor - Design and Performance Analysis for Identification of Various Blood Components

This paper presents the design of a biosensor based on 2D photonic crystal to identify different components of blood from 1.55- 1.60 μm wavelength range. The structure is based on a straight waveguide with hexagonal lattice and has small footprints (100μm2). The transmission properties of the electromagnetic waves inside the sensor for different refractive index values have been analyzed using the Finite Difference Time Domain technique. The photonic bandgap has been calculated using the Plane Wave Expansion method. The variations in the output power and wavelength have been used to identify the different constituents of blood. The ultra-compact dimensions and the high-quality factor make it a suitable candidate for biosensing applications in the medical domain.