ABSTRACT
RAJ KUMAR GUPTA*, DEVANARAYANAN V. P., and V. MANJULADEVI
Department of Physics, Birla Institute of Technology and Science, Pilani 333031, Rajasthan, India
*Corresponding author. E-mail: raj@pilani.bits-pilani.ac.in
ABSTRACT
The sensors based on optical phenomenon, surface plasmon resonance (SPR) is gaining tremendous scientific attention due its label-free nature, very large sensitivity, real-time detection, and analysis capabilities. The resonance condition is very sensitive to a minute change of the refractive index of the dielectric material deposited over the metal surface. This provides opportunity to develop a sensor by proper functionalization of the metal surface. In this chapter, we discuss the fundamentals for excitation of surface plasmon wave and SPR phenomenon. We review few important techniques for observing the SPR phenomenon which have led to the development of SPR-based sensors. We discuss the potential of SPR phenomenon for gas, chemical, and biological sensing applications with examples. In addition, we discuss briefly some nontraditional applications of SPR phenomenon.
