Design sensitive plasmonic based ۱D photonic crystal biosensor with graphene-two metal layer

In the present paper , we propose surface plasmon resonance biosensor in combination with a photonic crystal that works based on changing the refractive index of the biomaterial using the transfer matrix method to diagnose blood components. The proposed biosensor structure is (TiO۲/ SiO۲)^۲ / silver/ gold/ graphene , which gives a narrow angular reflectivity resonance. The performance parameters of biosensor such as sensitivity, detection accuracy reported. Our results show that the sensitivity of the proposed configuration is ۱۵۰ deg /RIU, which is acceptable compared to the values reported in previous studies and shows better performance of the proposed biosensor.

Keywords:

Biosensor , Graphene , Photonic Crystal , Surface plasmon resonance , Sensitivity