The distance between tip and sample can be regulated using piezoelectric quartz fork glued with micro optic fiber probe. A biquadrate vibration equation for the fork–probe–sample system is established to theoretically analyze the relations of the electric current flow through fork versus...

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...