The group has developed several generations of SPR sensing devices based on the excitation of surface plasmons using the attenuated total reflection method in prism coupler-based structures. The current prism-based SPR sensor system relies on the wavelength interrogation of SPR. The system offers a high degree of flexibility in terms of refractive indices of analyte (1-1.5) and a high refractive index resolution (better than 5×10-7).



Figure 1. SPR sensor system based on prism coupling and wavelength interrogation of surface plasmons. Forefront – the optical system for excitation and interrogation of surface plasmons, background – light source (left) and spectrograph (right).



Figure 2. Optical system for excitation and interrogation of surface plasmons – top view.



Figure 3. Optical system for excitation and interrogation of surface plasmons – side view.