Design considerations for surface plasmon resonance based detection of human blood group in near infrared

Abstract

Surface plasmon resonance based sensor for detection of different human blood groups in near infrared region is proposed. The plasmonic structure is based on fused silica or chalcogenide sulfide glass Ge20Ga 5Sb10S65, commonly known as 2S2G. Experimental results describing the wavelength-dependent refractive index variation in multiple samples of different blood groups are considered for theoretical calculations. The angular interrogation method is considered. The sensor's performance is closely analyzed in terms of its angular shift and curve width in order to predict the design consideration for simple and accurate blood-group identifier. The results are explained in terms of light coupling and plasmon resonance condition. Chalcogenide glass-based SPR structure is able to provide highly precise detection of different blood groups. The proposed low-volume blood sensor can be very useful for simple and reliable blood sample detection in medical application. � 2010 American Institute of Physics.