NEAR-FIELD SCANNING OPTICAL MICROSCOPE WITH THE APPLICATION OF SURFACE PLASMA RESONANCE (SPR)

The NSOM based on surface plasma resonance (SPR) technique is established. A new Kretschmann type of SPR is designed. The plasma with a gradient of thickness is fabricated using prism covered by gold film. The curve of SPR depending on the angle of incident beam is measured. The image of gold film on plasma is obtained at the SPR situation using this NSOM based on SPR technique. The experimental result indicates that the signal intensity, S/N ratio, and the resolution for NSOM are greatly improved based on this type of technique.